Allow appending tabs

Fix tab insert bug

Fix compile time warnings

Merge branch 'master' of github.com:johanmattssonm/birdfont

Merge branch '2.x' of github.com:johanmattssonm/birdfont into 2.x
Version 2.16.12

Merge ../birdfont-2.x

Fix progress wheel position

Fix orientation arrow

Fix hanging export and notification crash bug

Make sure background tasks exits properly on newer versions of Ubuntu

Merge branch '2.x' of github.com:johanmattssonm/birdfont into 2.x

Merge ../birdfont-2.x

Fix overview search and alternates

Merge ../birdfont-2.x

Add glyph tab to tab bar instead of raw glyph

Fix duplicated version in copies of glyph collections

Close open glyphs when they are deleted in overview tab

Merge branch '2.x' of github.com:johanmattssonm/birdfont into 2.x

Merge ../birdfont-2.x

Close background tabs

Faster text and icon rendering

This commit makes switching tools many times faster.

Merge branch 'master' of github.com:johanmattssonm/birdfont

Convert control points with zero length handles to lines
This solves a problem with the Beziér tool when the designer uses a grid to
create paths.

Merge branch 'stoptask'

Add button for stopping background tasks