Merge remote-tracking branch 'korpling/annis/develop' into develop
fixed #184 (It should always be possible to un-select a selected corpus)
fixed #191 (Double clicking on history entry throws exception)
Catch Exception when adding a new corpus set without authorization.

fix #175
Update the fragment with the currently selected corpora.

fixes #185
fixing #196 (left/right_token calculation does not work with multiple components)
Merged 'develop'.