"What is this" additions by @musikBear #896
Formatting fixes
Update PianoRoll.cpp
FileDialog: Add `/Volume` directory on OS X

See issue #1058
FileDialog: Add OS X Volume directory fix
Merge pull request #1112 from LMMS/stable-1.1-iss1058

FileDialog: Add `/Volume` directory on OS X
Merge pull request #1015 from tresf/stable-1.1

"What is this" additions by @musikBear #896
ConfigMgr: skip message boxes when in non-GUI mode

When rendering on command line do not display message boxes as LMMS
crashes otherwise.

Closes #1059.
Merge pull request #1115 from LMMS/stable-1.1

sync