text too small

[eagles051387]

On modern high resolution monitors (say, 100 dpi) the fixed font sizes used by LMMS are far too small to be readable.
On my monitor most labels are just 2 millimeters large. I'd need a magnifying glass to read them.

Please respect the font size settings of Qt. (In my case I need to use a point size of 16 to read text comfortable.)