Fix a bug with the Qt5 backend with mixed resolution displays#8931

Merged

dstansby merged 5 commits intomatplotlib:masterfrom

astrofrog:qt5-fix-resolution-change

Jul 31, 2017

Commits on Jul 24, 2017

Commits on Jul 25, 2017

Added a regression test to make sure the renderer size and figure dpi change when _dpi_ratio changes
astrofrog
committed
Fix order of execution in paintEvent
astrofrog
committed

Commits on Jul 28, 2017

Simplify FigureCanvasQTAgg.__init__
astrofrog
committed