Add dpi helper class
Seekbar: make it high-dpi friendly
Infobar: make it high-dpi friendly
Options: make the tree high-dpi friendly
MainFrame: make minmaxinfo high-dpi aware
Statusbar: make it more high-dpi friendly
Toolbar: scale and center volume slider
Respect system dpi settings when loading icons
Use LoadIconWithScaleDown() where available
Navigationbar: make it high-dpi friendly
Merge pull request #127 from alexmarsev/highdpi

Higher DPI