Added Serbian translation
First try to fix adobe/brackets#5537
Working fix for adobe/brackets#5537
Removed debug code
[fi] Fixed some typos
[fi] Fixed #5554 for Finnish translation
Limit drag-and-drop of image files or opening them from Open File dialog to be only one file. If multiple files are selected or dropped, then only non-image files get opened. If all of them are image files, then the last image file gets opened.
Allow installing older version of an extension if the latest version is
not compatible
- Disable Update button when latest update available isn't compatible with
Brackets (previously was erroneously left enabled in Installed tab).
- Clarify in _renderItem() when button is disabled (making it more obvious
that its tooltip string is always correct).
- Make it more clear that flags like 'context.isCompatible' are specifically
referring to the latest version available, not the currently installed
version.
Make some changes based on review comments.
Unit tests for dropping image files in Brackets.
Updated by ALF automation.
Merge branch 'pflynn/strings-latest-compatible-ext' into pflynn/latest-compatible-ext

Conflicts:
	src/nls/root/strings.js
- Update Extension Manager UI to use new warning string
- Add more unit tests for Extension Manager install/update button state &
ExtensionManager.getCompatibilityInfo() utility
- Fix crash when calling getCompatibilityInfo() directly on an installInfo
(instead of registryInfo) - though I think this now only happens in unit
tests
- Ensure getCompatibilityInfo() never returns isLatestVersion unless
isCompatabile is true
Corrected typo mistakes as suggested by frennky.
Updated by ALF automation.
Merge pull request #5661 from adobe/alf_localization

ALF Automation
Updated Serbian localization.
Included Serbian language under 'Debug > Switch Language' option.
Corrected Serbian language entry in sv/strings.js