Vestige Controls - Horiz Scrollbar Fix

Adds a horizontal scrollbar to VSTs Controls with longer knob labels.

Closes #1184
LmmsPalette: retrieve palette properties via polishing

Fix the short palette widget popup which is annoying and not neccessary
as polishing does the same job without flicker.
Add background artwork for carla
Removed the deprecated "Linux Multimedia Studio" name

Modified line 46 accorinf to https://github.com/LMMS/lmms/issues/1209
Merge pull request #1217 from unfa/patch-1

Closes #1209
Revert 2ca84c15a17faa71a300bfa4de2fdffadf9627aa
Fix fxmixer bug where fx chains get shut off when multiple channels are chained together
Reflect project rename in code

Related to #1209
Merge pull request #1203 from falkTX/stable-1.1

> Why isn't this applied yet?

All of the admins must be busy, sorry for the delay.
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Merge pull request #1228 from ma2moto/patch-1

Patch 1