When showing an About dialog for a plugin, so far a
KAboutApplicationDialog had to be used, by generating an KAboutData object
from the KPluginMetaData object.
Using KAboutApplicationDialog has those disadvantages:
- the icon shown in the title widget is the one of the application, not the plugin
- the "Libraries" tab does not make much sense with a plugin, as it is the same as the shell application
- the name KAboutApplicationDialog is a mismatch when used with a plugin