0.4.0b: UI scaling improvements

FIXES & IMPROVEMENTS

Desktop UI Scaling:

• Added scaling options up to 300% if screen resolution is greater than 1080p. This should be ample for 4K resolutions.

Couch Co-op:

• Improved camera zooming performance.
• Improved particle sizes with UI scaling options.
• Player name labels now resize with UI scale.
• Fixed camera zooming issues when inspecting treasure chests.
• Fixed positioning issues with weapon info panels.

Leaderboards:

• Added option under Account tab: "Send Leaderboard Scores". Enabled by default.
• Fixed an issue after submitting a score where the system message would parse a wrong number.

Weapon Selector:

• Weapon slots now scale smaller if needed, to ensure the slots are not hidden behind other UI elements.
• Fixed overlapping weapon slots for Radial layout if UI scale is greater than 100%.

Miscellaneous:

• Increased Online Co-op initial connection timeout from 5 seconds to 10 seconds.
• Fixed a crash that could happen after submitting a bug report.
• Fixed a hang that could happen when importing invalid options during startup.
• Fixed spacing issues with room modifier info.
• Fixed UI position issues when inspecting treasure chests.
• Reduced frequency of writing to Account file when incrementing achievement progress.
• Updated engine to Unity 2021.3.22f1.