Fiduswriter

**Fixes:**
* Don't stop transpiling/npm install if fodler disappears during folder deletion.

**Fixes:**
* Show documents only once on the overview page and other places where docs are listed.

**Features:**
* List Github export among plugins

**Fixes:**
* If user originally signed up with a social networking account that is no longer available, don't fail.
* Test fixes for Chrome 85

**Fixes:**
* Server goes into loop on connection loss (thanks anandksalien )
* Import of older documents with images

**Features:**
* Make edit model extendible by plugins

**Fixes:**
* Shortened "tracked changes" label in German

**Features**:
* Improved debug logging (thanks anandksalien )

**Fixes**:
* Better CSL usage for `inproceedings` bibliography entries
* Disable track changes related options in Selection Menu when they should not be available (thanks anandksalien )
* Avoid multiple loading of the optional section menu after reconnecting (thanks anandksalien )