fixed music player image button mouse over highlight
Merge pull request #4830 from Mailaender/music-button-mouseover

Fixed music player image button mouse over highlight
Updated building descriptions.
Overhaul ingame timer displays. Fixes #3062.
Remove World.FrameNumber.
Fix Sound coding style nits.
Merge pull request #4852 from pchote/timer-fixup

Overhaul ingame timer displays.
Merge pull request #4827 from ScottNZ/balance

Make Allied/Soviet factions use general-purpose mines
Add a new RA AttackMove cursor by @pizzaoverhead.
Add a new TD AttackMove cursor.
Add a new TD guard cursor.
Add new TD goldwrench / capture cursors.
Add a new attackoutsiderange cursor to TD.
Remove TD dependency on the RA cursors.
Clean up AttackCharge.
Clean up AttackOmni.
Clean up AttackPopupTurreted.
Fix style nits in other Attack traits (no logic changes).
Make Attack*Info plumbing consistent.
Remove some unnecessary trait/info lookups from AttackBase.