WIP
Merge branch 'master' into CategorizedRendererUpdate
Numerous enhancements to graduated and categorized symbol renderers
Merge branch 'master' into CategorizedRendererUpdate
Removing compiler warnings
#10767: No replace the simplified geometry by its BBOX when there are 'long' segments
Merge branch 'master' into CategorizedRendererUpdate
Refactoring ready for manual update dialog.  Also improves labelling of StdDev classifications and better determination of decimal places to use
Implementation of graduated renderer breakpoint editor, minus SIP for editor
Merge remote-tracking branch 'upstream/master' into CategorizedRendererUpdate
Reverting class editor patch
fix #11251 (embed form dual view icons)
[FEATURE][composer] Add checkbox to frame items for preventing export
of page containing frame when frame is empty. This change allows
users to create multiple pages containing extra frames for multiframe
items (currently HTML and Attribute Table items), which are then only
printed/exported if required. Sponsored by the City of Uster, Switzerland.
[composer] Switch attribute table column dialog over to QgsDoubleSpinBox
Make QgsExpression parser reentrant. Fixes crashes when expressions are parsed in multiple threads.

Sponsored by a big dose of caffeine.
[dbmanager] messagebox => messagebar
[dbmanager] followp 1646f67: fixes some string and changes more messageboxes
[dbmanager] again replacement box->bar stuff....hopefully the last :-)
dbManager - remove more 'Sorry' strings
[FEATURE][composer] Allow data defined control of atlas margin for maps