Good afternoon everyone,
As noted in my previous reply, I wanted to follow up after trying the Rule Machine Manager app. It works GREAT! Not once did the app abnormally end, hang, or anything along those lines. Even after creating multiple containers, creating many duplicate rules, and moving the rules many times in and out of containers. At first I was a bit "concerned" about losing my work and would save ever 3 minutes or so. After awhile I stopped as I became very comfortable with the stability and reliability of the app.
I tested renaming, adding, and deleting rules inside HE. All changes were reflected in Rule Machine Manager once you saved the app, exited, and re-loading the app.
Observations:
The only strange observation I noticed after about 5 hours of using the app was when selecting multiple rules. When holding the CNTL key and selecting more than 4 or so rules (no consistent number) the highlighted selections would un-highlight and the rules would be moved all together within the same container I was working in vs. giving me the opportunity to move them to the intended targeted container. Not detrimental in any sense. All was necessary was to re-select them (all now adjacent at this point) and move them to the target container. This was the only unintended consequence that occurred while using all the functions.
Suggestions:
Note: These suggestions comes with me being an early user of the app. Some may or may not make any sense. Some may show my lack of experience, knowledge and understanding of how I should have been doing something 
- Provide a way to delete all of the duplicate rules (children) of the parent rule at one time. Currently the duplicate rules are identifiable by a trashcan. You need to look for the duplicate titles of the rule and the associated trash can icon. If the rule has been duplicated multiple / many times this can be time consuming and opens up a margin of error. I believe it would highly desirable if you could select the parent rule (identifiable by a double-page type icon vs. a trashcan), select it, and have the a ability to click on delete all duplicate rules.
02 Have individual options to (1) sort all containers and (2) sort all rules within containers. Although there is an option to sort the rules within a container you have to go to each container and do it individually within each container one-at-a-time. This would eliminate a fair amount of time dragging containers in alphabetical order and having to use the sort option on each set of rules individually with containers.
03 Have the ability to search across all contains the same way you can currently search within a single container
04 Have the ability to toggle on / off the "are you sure you want to delete" message. During setup or mass manipulation of rules during setup this does get in the way pretty quickly (at least with the number of rules for me during my initial configuration). Given the "operator" the option to toggle on / off might be a nice option.
Summary:
What I ultimately needed to accomplish when I made my initial suggestion for tags in Hubitat rules was far exceeded by this app. That being the ability get a cross-categorization of my rules so I could quickly identify what functions a device may be control by. I was highly desirable for me to achieve this without having the title being any more that the location and a simple description of what the rule does. This was important so that others in the house (other than I who developed the rule) understood what it does (oh yeah me too as I get older and sometime don't revisit a rule for 8 months lol).
Please note the re-naming of the rules have not yet occurred achieve to remove everything but the location and the description. Ran out of time today. The final step will be to rename the rules with examples being:
OLD - Dining Room Ceiling Fan - Manual Even [Fan Off]
NEW - Dining Room Fan Off
OLD - Kitchen Room Lighting - Scheduled Event Lights On Daily [15:00] Off [07:46am]
NEW - Kitchen Room Lighting - Lights On Daily [15:00] Off [07:46am]
OLD - Living Room Lights - Motion Detection Lights On
NEW - Living Room Lights - Lights On
OLD - Mailbox 4900 - Triggered Event Open Detection
NEW - Mailbox 4900 - Open Detected
OLD - System - Health Check [Virtual Network Ping Critical]
NEW - Virtual Network Ping Critical
Kitchen - Refrigerator Monitoring Commercial Power Lost
Kitchen - Refrigerator Commercial Power Lost
Living Room Lights - Motion Detection Lights On
Living Room Lights - Lights On
Device Cross Functional View - Computer Room EPO Switch:
Button Controllers
Emergency Power Off Rules
Triggered Rules [Event]
Triggered Rules [Manual]
and if cross container search is implemented can be easily be located across containers to include items in button controllers. Items in Button Controllers is already available for Container View they just cannot be searched on across containers (to my knowledge).
Interface Screens:
NOTE: I tried to provide a way to convert my captured .mp4 to an acceptable Hubitat movie format of webp, avif, or other format. After a good bit of time I had to move on and just did the standard screen shot approach. If you enlarge and scroll you will get a sense what the interface looks like with my data loaded.
Ecobee — Change set point if windows or doors are open" or "
Mode - Home from Away". I don't use tags. If the rule is complex or I might forget why I did something in a particular way, I include a note.
I throw that in so I don't get any follow up questions, that I will not be able to answer 
