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
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.
Fix dialog header height
Remove the default (red) color on code blocks.
Merge pull request #4083 from adobe/glenn/issue-4073

Fix styling of recent projects dropdown
Merge pull request #4086 from adobe/glenn/issue-4074

Fix dialog header height and "clear search" button
Merge pull request #4088 from adobe/iwehrman/restyle-code-blocks

Remove the default fuschia color on code blocks
Fix in-browser menus