* Add subscription community tab
* fix up community tab
* simplify if statement
* use global.community for all references to community
* dont show community when useRss is set
* check visibleTabs for showing the community tab
* fix caching, decrease datalimit for community, add missing translations
* L: Hide shared posts, IV: Don't show errors for empty community tab
* add links to related issues
ChunkyProgrammer