[webui] Removed get_trackers-function from patchinfo-controller
This is not required in the new format for adding issues
[webui] Catch error if a connection to bugzilla is not possible in patchinfo-editor (e.g. in the test-env)
[webui] catch error if an unauthorized user tries to edit the patchinfo per direct url
[webui] Added testcases for the patchinfo-editor
- added id-tags where necessary in the patchinfo-views
[webui] Wait for javascript after adding an issue in the maintenance workflow
- Fixed the added issue that it matches with the regexp
[webui] - Moved delete_patchinfo into patchinfo_create_test
- use page.wont_have_content instead of has_content? == false
[webui] update to codemirror 3 and port the toolbar code a bit

It seems to work more reliable with FF17