Patch notes - Minor bugfixes and usability stuff

Fixed a bug causing the (X) close button in the keymapping menu to not show up if you entered the keymapping menu from the pause menu.

Scooched the settings menu slightly to center it better.

Fixed a bug where you could click through the difficulty menu to the pause menu if you clicked in just the wrong place.

Fixed a bug causing the skill tooltip display to remain up indefinitely if you paused while hovering a skill in combat deployment.

Turn order shuffling at combat setup is now pseudo-random, guarantees the player's first goblin goes either first or second, attempts a somewhat more even distribution as the initial order.

Added tooltips to the difficulty settings. (Only accessible with cursor currently, sorry gamepads!)

Fixed a recently introduced bug making scrollwheel not work with memory/affinity selection.