Fix #1051
Fix #1052
Merge pull request #1057 from xxMUROxx/hotfix/NumericUpDown

Hotfix/numeric up down
increase scrollbar repeat buttons and thumb
fix the redraw bug

set only AllowsTransparency="true" and all works fine
Merge pull request #1065 from MahApps/985-punker76-combobox-non-aero-redraw-fix

fix for combox popup redrawn bug
Merge pull request #1064 from MahApps/1033-punker76-scrollbar-size

increase scrollbar repeat buttons and thumb