Feature #2667 - Improved score screen. Improved objective list in pause ...

Improved the score screen that displays when the game is over. It now uses a unique game over modal and lists objectives completed/failed in addition to showing a message and final score. Also improved the rendering of the list both in the new score screen and in the pause menu.

Added icons for backpack and cellphone access. The cellphone icon is currently a placeholder with no attached functionality.

Added support for random triggers.

Improved support for props with hover images; the images no longer need to to have the same size/position to appear correctly.

Removed confirmation prompt when returning to the main menu after the game is over.