Tracker InfoWindow: layoutify, use tabs

- Use layout kit to make a few things simpler
- Separate the view showing the header (icon/name) and the one showing
the extra details, making two simpler files instead of a complex one
- Fix some layouting issues
- The permissions are now in a second tab, allowing to add a third one
with other things (more on that later)

screenshot: http://pulkomandy.tk/drop/fileinfo.png

Change-Id: Ief80815eba749723664f40f1317f8aa4cf692162
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1745
Reviewed-by: Ryan Leavengood <leavengood@gmail.com>

Tracker: move AttributeView to own file and rename

Change-Id: I046eb9aa0fef792e9e940d0a6dfd887ede2fa996
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1744
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Tracker: move InfoWindow to a subdirectory.

I'm going to split it into even more files, and it's easier to track
what's part of it this way.

Change-Id: I09c302da38ce96f0077c5f53fd17c08cdd6c22c9
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1743
Reviewed-by: Ryan Leavengood <leavengood@gmail.com>