Mouse movement spike when locking

1) Open project and console besides
2) Move mouse to left, top corner of window and take hand away
3) Check console, movement vec = (0, 0, 0, 1)
4) Press space
5) See mouse movement vec spike (something like (-680, -407, 0, 1)).

Nerveless I'm not moving the mouse (when pressing space), it registers the movement it been taken to center?

Anyway, this is a problem when shift mouse lock in-game on/off, as these spikes can cause mouse controlled object to twist madly (those values are huge).

[untitled.zip](https://github.com/armory3d/armory/files/2923273/untitled.zip)

OS Ubuntu Bionic, arm 0.6 UTD,

Open the attached untitled.zip project and reproduce the issue on Ubuntu Bionic using the listed steps, watching the console's mouse movement vector. Trace the mouse-lock transition triggered by pressing space and verify that toggling mouse lock without physical movement no longer produces a large movement spike.

Written by the indexing model from the issue text.