If a plugin is loaded and errors happen it will not be active, it should
still be displayed correctly in the installed plugins treeview

The short_name attr must be equal the folder name of the plugin,
otherwise get_active_plugin() in PluginManager fails

Andriy Kushnir authored Oct 27, 2018 and Philipp Hörist committed Nov 02, 2018

Fixes #358

pitchum authored Oct 13, 2018 and Philipp Hörist committed Oct 19, 2018

- bitlbee
- pix-art
- poezio
- xabber