Add messages for more exception types.
Return Future.error instead of throwing exception in git branch.
Adjust icon size per UI team request
Normalizing SVG formatting
Remove unused image
Resize buttons in tabs, 'Search' and 'Goto line' per UI team request
Move project/folder disclose triangles 1px higher
Revert close button size for tabs to 18px: 24px seemed excessive
Merge remote-tracking branch 'upstream/master' into svg-icons-3
Fix build not returning when cloning a dart repo.
Fix class members in Outline

Class members were displayed as top-level items (not indented and not highlighted when the class was hovered over).

This also further streamlines the relationship between the items-to-scroll-to vs. items-to-add-to-top-level-list hierarchies.
Fix highliting of classes in outline + clean up outline CSS
Merge remote-tracking branch 'upstream/master' into resizable-outline-and-better-button

Conflicts:
	ide/app/lib/outline.dart
	ide/app/spark_polymer.css
Restore dark scrollbar in outline
Merge pull request #2619 from ussuri/dark-scrollbar-in-outline

Restore dark scrollbar in outline
Synchronize styling of outline toggle button with the rest
fix an issue with refreshing resources
review changes
Merge pull request #2624 from devoncarew/devoncarew_fix_refresh

fix an issue with refreshing resources
added comment.