Old MainWindow display takes over the screen and blocks other inputs

**Describe the bug**
When starting the Application, for some users the old HUD view on the Desktop catches all input events.
Because of this, no Windows underneath this HUD can be used.

**To Reproduce**
Steps to reproduce the behavior:
1. Start ReHUD
2. Try to use other applications

**Expected behavior**
All windows under the HUD should be usable.

**ReHUD Version:** Alpha-1
