* Rework to display bar on mixers, hence needs a more flexible drawSingleXXBar approach
* First working version
WARNING : displayMixConvertMask() DOES have a bug, do NOT PR without fix
* Fixed displayMixConvertMask() bug
Cosmetics on placement on status bar
* Cosmetics
* Improved graphics by mhotar !
* Fix for multiple lines mixers
Cosmetics
* Fine tune column values to handle more complex mixers lines
* Replace +=, *=, := by icons
* No needs to use mask bitmap
* Remove unwanted png file
* Fix handling and conversion of Mask to Bitmap
* use loadAndConvertMask here too
* Typo
* Screen layout fine tune
* - Move loadMaskOnBackground to framebuffer.cpp
- replace loadMaskAndConvert by loadMaskOnBackground
* Cosmetics
* Move new icons to theme loading
* Fine tune Mixer setup screen on darkblue
