Detail view: Adjust tab colors
CLOUDSTACK-4758: UI > Create Compute Offering > add new field "Custom" checkbox > when it's checked, Number of CPU Cores/CPU/Memory field become non-required and hidden.
Detail view: Adjust tab panel colors

-Remove border/BG from individual group, for better visual flow

-Remove button appearance from actions

-Misc. small positioning tweaks
Add a bit more padding to header bar
Multi-edit: Fix wrapping on table headers