Vcbutton fixes

Fix some issues with buttons activation...

*The "button-stays-green" issue:
First case:
- Be in Design mode
- Create a Blackout button
- Activate blackout from the app top-right blackout button
- Go to our button's properties
- Change its action to Toggle function, join it with a function
- Go to Operate Mode
- Can't to anything with this green button ! Damn it.

Second case:
- Be in Operate mode
- Have a running function associated with a toggle button
- Toggle on liveEdit mode
- Change the function associated with the button
- Toggle off liveEdit mode
- Again, can't to anything with this green button ! Damn it.

Some other cases:
- ...
- Again, can't to anything with this green button ! Damn it.



*The "why-does-this-get-green" issue:
- Be in Design mode
- Create a button, link it to a function, and change its action to "blackout"
- Create another button, link it to the same function as before, let it be a "toggle function" button
- Go to Operate mode
- Click on the second button, the "blackout" button will get green