Put song browser menu at the bottom on all aspect ratios.

This is hacky as it's hardcoded instead of coming from a themefile.
However, the current theme position deduction can't handle
different aspect ratios or anchor points (AFAIK).
Clear screen each frame to prevent graphics glitches.
Instrument icons: reposition, enlarge and add glow.
How about some movement for the fullscreen backgrounds too?

Ideally it should zoom to different locations and do fades.
Fuzzy border for cover flow ground.
Update FI translation.
Restore old filter hotkey order.
Add filter for full band.
Fix display bug when no song matches the text filter.
updated Dutch language translation as somew things were translated
really ugly.
updated japanese translation, still alot to do
re-indexed all language files
Completed dutch translation
Merge branch 'master' into fspath

Conflicts:
	game/songs.cc