Added Serbian translation
[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.
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 Serbian localization.
Included Serbian language under 'Debug > Switch Language' option.
Corrected Serbian language entry in sv/strings.js
Spanish strings for sprint 33
Update Spanish Getting Started to sprint 33
Review fixes for spanish strings sprint 33
Update LIVE_DEV_NEED_HTML_MESSAGE Spanish translation
Merge pull request #5676 from adobe/jbalsas/spanish_sprint33

Spanish strings for Sprint 33
Allow hyphens in tag names in live HTML