updated czech translation

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

fixed extensions translation
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
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
Re-order selectors