Remove welcome project duplicate fix

Clean up welcomeProjectsFixed code - Issue #2823
Add placeholder menu when running native menu unit tests.
Keyboard shortcut for open folder
updated czech translation

updated all strings based on sprint 25. also translated hardcoded strings.
fixed extensions

fixed extensions translation
handle the case where the CodeHintManager rejects a deferred hint
Giving #9F9F9F a try.
Merge branch 'master' of https://github.com/adobe/brackets into larz/darker-comment-color
Removed accidental additions in boostrap modal caught by Bernhard.
Applied active state to all toolbar items.
basic unit tests for new JSLint results panel toggle
Merge branch 'master' of https://github.com/adobe/brackets into larz/toolbar-icon-active-state
Added active state for lint warning icon.
Update strings.js
modified:   src/extensions/default/JavaScriptCodeHints/ScopeManager.js
Don't update the modified range when 'null' keys (ctrl-space) are hinted.

modified:   src/extensions/default/JavaScriptCodeHints/main.js
When changing files, reset documentChanges to null.

modified:   src/extensions/default/JavaScriptCodeHints/unittests.js
Restore that content of a file after each test.
Update a test to wait for hints after it asks for hints. If the hints are not waited for the editor will be torn down before the hint completes, causing a null pointer exception.
Merge pull request #4080 from dloverin/fix-ctrl-space2

Don't mark document as modified when ctrl-space is pressed
Merge pull request #3927 from dloverin/handle-rejected-hints

handle the case where the CodeHintManager rejects a deferred hint
Merge pull request #3979 from kvarel/patch-2

updated czech translation
Fix styling of recent projects dropdown
Merge pull request #4060 from adobe/larz/toolbar-icon-active-state

Applied active state to all toolbar items.