[Settings][Spices] Fix IO error
Prevent flashing previously viewed detail, bind to preview window destroy/delete to prevent actual destruction of window, correct progress bar text for subsequent screenshot downloads
Use gi.repository version of Pango, causes strange errors with some
other libraries.
Merge pull request #1713 from mtwebster/pango-import

Use gi.repository version of Pango, causes strange errors with some other libraries
Merge pull request #1711 from rjanja/ai-fixes

[Settings][Spices] Minor fixes to applet installer
Merge pull request #1710 from dalcde/settings-fix

[Settings][Spices] Fix IO error
Merge remote-tracking branch 'upstream/master'