v1.07 Locking made easier, multiplayer made smoother

Basics:

1. When locked, the `Toggle` button is hidden, so `Clock` and `Click Count` cannot be switched; (this can be enabled or disabled in system settings, enabled by default)

2. Optimized the UI style of the `System Settings` interface;

Multiplayer:

1. Optimized the style of the Tab switching buttons in the multiplayer interface;

2. Optimized the multiplayer issue where, after locking the interface, a friend's catgirl above yours would block your own prop draw;

3. Fixed a BUG where pressing the `Alt+Q (default)` shortcut to hide the game would reveal other players who had joined the room;

BUG:

1. Fixed a BUG where the background interface was clipped in the prop bar interface;