v0.9.2

• fix settings link not showing up on Firefox in mobile layout with NC14+
• fix the controls bar position when collapsible navigation pane is open in mobile layout
• fix positioning of the "Update scanning results" button on mobile layout
• fix UI sometimes getting into inconsistent state when library path changed (invalid SQL exception on back-end)
• fix performance issue on file deletion when the user has huge amount of image files (#664)
• performance/scalability: do not search cover art for all users after scanning library of one user
• show load indicator on settings view while library path change ongoing
• do not scan files with MIME type 'application/ogg'