DriveSetup: Tweak mount mode icons and colors

* Use 2D icons for mount modes: encrypted, file, readonly, shared
('boot' already uses he 2D Overlay_leaf)
* Use more vibrant colors for used space in

DriveSetup: Tweak mount mode icons and colors

* Use 2D icons for mount modes: encrypted, file, readonly, shared
('boot' already uses he 2D Overlay_leaf)
* Use more vibrant colors for used space indicators.
(red = readonly, green = BFS, blue = non-BFS, grey/orange = encrypted)
* Don't have boot/bfs partitions override readonly status (red) with
green. Keep it simple: if anything mounts read-only, show in red.

Change-Id: I4a7c53e1c1d3c6f4be35cbd680b2a7b5e1f9bea3
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1755
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

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