Implement basic journal display
Implemented "attachPatch" - the redmine version in debian supports it - and that version is ancient!
Show description preview by default for issue if issue is not new
Modify search panel layout to be more compact
Make issue table sortable
Fix Priority Setting
Cleanup filter (remove unusable filters and add GUI element to clear selection)
Extract Expandandable Panel into seperate class
Implement comments in updates
Tweek Journal Display to be more in line with redmine webview
Add Attachment-Display/Adding
Remove references to Status- and  Schedule provider

Status provider is only sensible with a persistent cache and schedule provider currently assumes the issue is persisted (which is not the case)
Move first parts of Query and Issue handling to issue tracking api
Fix warnings about unsupported multivalued parameter (bug introduced when refectoring query saving)
Bugfix: Query-String was not saved after query (the mechanism basicly destroyed the parameter map on each query invocation)