A small update with some UI changes

This is a small update to the engine that adds some quality of life changes and UI improvements and fixes some bugs.

Features

Controls Menu

Now you can look up at the hotkeys and mouse controls on the introduction splash screen.

Free panning with the mouse [Experimental]

Pan the map by holding down the right mouse button and dragging. This feature is still experimental and there can be bugs.

Bugs

Fixed a major bug in the UI selection menus whereby clicking anywhere in the menu that is not a menu item would crash the game.

Misc

The procedural generate now leverages multithreading, if you have a multi-core CPU, specifically, precomputing the A* paths should proceed faster. Also, a bug in the intro loading screen has been fixed whereby previous not all loading messages were being properly displayed.