Fix for crash when searching using some filters

Ended up being a really big update, added a lot of stuff that I have wanted to for some time, and added some features from your feedback.

If you are enjoying the app consider leaving a tip :)

Added:

• New Downloads page features/look:

• Updated the look of the main downloads page to be clearer and provide more info,

• Now more like NZBGet webinterface,

• Added priority indicator like NZBGet web page,

• Added health and failure rate inidicators,

• Added NZB Age,

• Imporved progress bar,

• Please provide feedback,

• Orange 'Speedometer' now shown next to download speed when limit set,

• New Downloads Details Page:

• Details now auto updates the same as downloads page,

• Shows downloads 'cell' at top of details,

• Added Server Articles like NZBGet web page,

• Sperated actions/post/dupe/files/logs and information into differnt tabs,

• More infomation is now avalable,

• Please provide feedback,

• Auto 'Auto-Categorizer':

• 'Auto-Categorizer' will check the name/title of an NZB being fetched or uploaded and attempt to set a category, using regular expressions (regex or regexp),

• Set your own regex-category pair/s,

• Works when fetching from Search or uploading from files,

• Local Downloads Manager:

• After finding an NZB via search (in-app) at the bottom of the NZB Details page, tap the button called 'Save NZB to App' to download the .nzb file to the app for later use,

• View Local Download Queue, by going to the files tab, then the 'cloud' icon in the top right,

• When searching change the 'GET' button for fetching to 'SAVE' for downloading to files instead of sending it to NZBGet,

• Option to only download on wifi (enabled by default) see custom settings,

• Completed uploaded NZBs are now moved to 'Uploaded' folder in the files directory,

• Option to save local NZBs to sub-folder/s in 'Files',

• Swipe left on NZB in 'Files' to move to different folder, or create a new folder,

• Note: This only downloads the '.nzb' from your search provider, and does NOT download anything from Usenet,

• Edit Indexer Menu:

• Added menu to edit all your indexers,

• Move and change order,

• Set Default,

• Delete indexer/s,

Updated/Fixed:

• Improved server setup, will now correctly shows error 401 Unauthorized, if login failed and username/password is wrong,
• Option to show/hide password when adding/editing server,
• Fixed minor issues with some search providers,
• Improved Advanced Search,
• Fixed issues with setting up new server on iPads,
• Downloads page will always refresh when on other tabs,
• Default Cat now set when tapping 'GET',
• Fixed issues with caching added in last update,
• Fixed bug where swiping left to edit/delete download would 'snap' closed randomly/when updating,

Thanks to everyone who suggested these new features.

Feedback and surgestions always apparated and welcomed :)