Tracked progress
Added Qt resource file
FiveStarRatingWidget read only widget
Created BookmarkPreviewDialog.
I mostly copied BookmarkEditDialog's codes for this purpose.
Some name changes in FiveStarRatingWidget
Rename BookmarkPreviewDialog to BookmarkViewDialog
Rename BookmarkPreviewDialog to BookmarkViewDialog in its codes too
MainWindow can now "View" bookmarks
Viewing is now the default action on Bookmark activate

In MainWindow, now double clicking a Bookmark Views it instead of Edting