_template folder missing in AppImage

[KarlZeilhofer]

When trying to generate plugin code on Linux with the AppImage, the log messages show, that the _template folder cannot be accessed.

Workaround

• set paths in settings
  
• clone git repo and copy _template folder from
  ./ImagePlay/media/plugin_development/_template
  to /home/karl/imageplay/plugindev
• If the folder that should be generated already exists, delete or rename it.
• now the code generation should succeed

[l00mi]

The AppImage was kindly provided by @probonopd. He might give us a hint?

[probonopd]

The application should check upon launch whether $HOME/imageplay/plugindev exists and if it doesn't, copy it out of the AppImage to that location. The directory's location inside the AppImage shall be determined by using e.g., QString QCoreApplication::applicationDirPath() and constructing a relative path from there.