Update Panel styling in platform themes.
Update Tabbar styling for platform themes.
Merge pull request #92 from dankurka/panel_styling

Update Panel styling in platform themes.
Update buttonbar platform stylings.
Carousel platform styling.
Merge pull request #93 from dankurka/tabbar_styling

Update Tabbar styling for platform themes.
Merge pull request #94 from dankurka/update_buttonbar_platform_theme

Update buttonbar platform stylings.
Merge pull request #95 from dankurka/carousel_platform_styling

Carousel platform styling.