Folder polish: unbold folder title, ensure icons not cropped in folder.

- Ensure folder items are scaled to fit within the height/width in 4x5 mode.
- This bug surfaced now since  we increased the icon size.

Bug: 194356039
Test: set display to large, set font to large
Change-Id: Ie360ca67c3c91649a471bce920b2fc6a82fb9661