Update CZE translation
Update CZE translation
Add application category for OS X

The /Application folder tends not to be subfoldered so since Lion, this folder's had View --> Arrange by Application Category -- but without the metadata it gets sorted into "Other" at the bottom. "public.app-category.entertainment" is the category used by media servers in the App Store.
Removed redundand null checks
Removed unused import
Merge pull request #268 from duanemoody/patch-1

Add application category for OS X
Formatting
Improved support for transcoding to H.264 (thanks, tdcosta100!)
Allow muxing of non-mod4 videos to Bravia TVs (thanks, tdcosta100!)
Revert commit ab80d112e2ff419e1101734fced213b9b2607a6f
Fix frame initialization

Message dialogs are now shown correctly in the middle of the main UMS
window not in the middle of the screen
Center the plugin edit dialog to the main UMS window