Add maintainer field to plugin update

qgis-app/plugins/forms.py

@@ -43,10 +43,24 @@ class Meta:
             "tracker",
             "repository",
             "owners",
+            "created_by",
             "tags",
             "server",
         )
 
+    def __init__(self, *args, **kwargs):
+        super(PluginForm, self).__init__(*args, **kwargs)
+        self.fields['owners'].label = "Collaborators"
+
+        choices = (
+            (self.instance.created_by.pk, self.instance.created_by.username + " (Plugin creator)"),
+        )
+        for owner in self.instance.owners.exclude(pk=self.instance.created_by.pk):
+            choices += ((owner.pk, owner.username + " (Collaborator)"),)
+
+        self.fields['created_by'].choices = choices
+        self.fields['created_by'].label = "Maintainer"
+
     def clean(self):
         """
         Check author

qgis-app/plugins/templates/plugins/plugin_form.html

@@ -66,7 +66,7 @@ <h2>{{ form_title }} {{ plugin }}</h2>
         let element = document.getElementById('id_owners');
         if(element) {
             $('#id_owners').chosen({
-                placeholder_text_multiple: "Select Some Owners",
+                placeholder_text_multiple: "Select Some Collaborators",
                 no_results_text: "Oops, nothing found!"
             });
             clearInterval(checkElement);