MDLC01

Makes text more pleasant to select by improving the "move by word" feature (Ctrl+← and Ctrl+→), and enabling text selection with the mouse.

Fixes MC-121278, making Ctrl+A and other keyboard shortcuts work on non-QWERTY keyboard layouts.

Moves the chat above the armor bar.

Makes the game mode switcher (F3+F4) never preselect Spectator, and enables it even without operator permissions.