Add shadow to tabbar & navigation toolbar similar to shadow file tree view has
Merge pull request #2603 from ussuri/tabbar-shadow

Add shadow to tabbar & navigation toolbar similar to shadow file tree view has
Revert "Add shadow to tabbar & navigation toolbar similar to shadow file tree view has"

This reverts commit 47e4085ca188a0c8ff5aaedcc4a682cf91b99d6f.
Merge pull request #2604 from ussuri/tabbar-shadow

Revert "Add shadow to tabbar & navigation toolbar similar to shadow file tree view has"
Added tooltips on files view git status / errors / warnings (fixed #2598).
Merge pull request #2606 from dinhviethoa/2598-tooltips

Added tooltips on files view git status / errors / warnings
Don't show save feedback on automatic saving (fixed #2599)
Default value for userAction
Merge pull request #2608 from dinhviethoa/2599-no-save-message

Don't show save feedback on automatic saving
Fix a bug in diff. Fixes checkout issue.
Added type aliases to outline (typedefs)
Added comments.
Merge pull request #2609 from dart-lang/fix_git_checkout

[Hot Fix] Fix a bug in diff. Fixes checkout issue.
Review fixes
Merge pull request #2610 from dart-lang/umop-outline-function_type_aliases

Added type aliases to outline (typedefs)
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