Clean up previous oxygen icons
Add tango icons
Add tango icon use to Icon functions
Improve look of toolbar buttons
Allow overriding of icon theme
Disable selection of individual cells in balances/diffs tables
Remove limit of 5 rows in estimate diffs model
Filter displayed over/under estimates by type
Merge branch 'task/estimate-diffs' into qt-rewrite
Merge branch 'task/tango' into qt-rewrite