Feature Request: Control-A in Per Key Solid to select all keys

[jedineurobat]

When I set up per key solid color layouts, often it is just a few keys that have different colors from the rest. I would like to be able to select all keys and then select a color. Then the current tools to select a group of keys and then set their color is great. What is missing is that ability to first select all keys.

My recommendation is to have a control-a function that selects all keys. This hotkey should then be added to the help text on that screen along with the current shift + click currently there.