Button held messages kept sent when pressing non key or button items

[martonmiklos]

Hello all,

If I click on an inputnumber the key press state got cached here for all object type: https://github.com/Open-Agriculture/AgIsoVirtualTerminal/blob/main/src/DataMaskRenderAreaComponent.cpp#L99

However this only get cleared for key and button object types (on release): https://github.com/Open-Agriculture/AgIsoVirtualTerminal/blob/main/src/DataMaskRenderAreaComponent.cpp#L159 https://github.com/Open-Agriculture/AgIsoVirtualTerminal/blob/main/src/DataMaskRenderAreaComponent.cpp#L141

This will result the button held messages to be sent continuously:

I have filtered the save in the press event to key and button and it looks to be working correctly, but I wanted have some discussion before PR.