Fixed portraits' frames (saving a png as a jpg... hurr durrr)
Move hero's tooltip to topleft of hovered character
Moved up heroes' names (yes, 1px is noticeable!)
Changed career's background brushes to some dark-mid toned brown
Forced HeroView to content area's top-left
MainWindow's top panel now receives a dark gradient background, and clear brown font color
Refactored image serving methods in FSBNetService
HeroPortraitSubRectConverter now returns null in case any of the 2 values are themselves null. Still bad, but avoid crashing
FSBNetService now detects which image encoder to use based on extension