Merge branch 'develop', remote-tracking branch 'upstream/develop' into develop
disable simply of polygons for roads #1300
Fix for user extents so that they can be cleared properly
Added clear button
clear button for extent selector
Merge pull request #1326 from timlinux/marquee_fixes

Added ability to clear user extents
Merge pull request #1313 from assefay/develop

Disable polygon simplify
Fix #1330 - Extents to dataset not respected.
Merge pull request #1331 from timlinux/develop

Fix #1330 - Extents to dataset not respected.