Log Message:
x11/libfm-qt: update to 0.16.0

-Clear selection before selecting an item in side-pane.
-Update text color of places view if style changes in runtime.
-Added a missing nullity check to file dialog code.
-Fixed unwanted selection of all items in detailed list mode.
-Fixed a memory leak in launching desktop entries.
-Remember file sorting, showing of hidden files, hidden places of side-pane,
showing of thumbnails, and icon sizes in LXQt file dialog.
-Better focus change with Tab/BackTab in file dialog.
-Open mount targets of mountable directories when they are clicked in file
dialog.
-More efficient and simpler code for graying out cut files.
-Also consider the legacy bookmarks file in bookmarks dialog.
-Guarantee horizontal alignment for pathbar scroll buttons.
-Natural (GTK-like) file sorting by treating dot as separator.
-Avoid QListView's DND methods in our list view.
-Support special chars like `\n` and `\t` in path button name.
-Code cleanup.