Fly mode active when changing focus

[christopher-rieder]

Create a new map. Use fly mode in any direction (wasd). I'll use 'S'.
Then change the focus with the mouse while keeping the 'S' key pressed. To another viewport in 2, 3 or 4 pane view or to the entity inspector by making a click in it, etc. Release 'S'

The 3d viewport keeps moving away as if the 'S' key is still pressed. When you focus again in the 3d viewport, it keeps moving. Pressing 'W' stops the camera movement. Pressing 'S' restarts the key pressed status and it doesn't stay pressed anymore.

[dumptruckDS]

Damn I thought this was my keyboard sticking. So annoying.

[christopher-rieder]

this solves #1257 ; it's the same thing

[kduske]

Thanks!