0.7.0

Changes:

● Handled newlines and text tabs in item names as far as possible.
● Natural sorting of items by treating dot as a separator.
● Set the window title to the archive name.
● Added context menu to the archive path bar for copying path and opening containing folder.
● Used 7z for uncompressed disk images and bsdtar for compressed ones.
● Added fallback icons for files and folders (for systems without icon set).
● Fixed emblemized icons with device pixel ratio.