Add card background drawables, including light variant.
Update shows row layout for phone screens.
Update shows row layout for tablets, also fix grid spacing.
Change network and time separator back to slash.
Lighten up placeholder background color.
Remove placeholder background for now.
Replace add show icon with suffix variant.
Replace add list icon with suffix variant.
Add xxhdpi versions for some icons.

- Had to replace filter icon with own variant to ensure alignment.
Merge branch 'suffix-icons' into beta
Merge branch 'beta' into item-boxes
Fix context menu icon resolution.
Refactor checkin activity adapter, remove bg from favorited icon.
Unify some adapters into abstract BaseShowsAdapter.

- Then extend from that one.
Use new box layout on movies, fix spacing.
Also fix movie spacing for movie search fragment.
Merge branch 'item-boxes' into beta