Classes: Small fix to adapt to linuxmint/mintcommon@8ec5d4f8f.

Runtimes will all get treated the same, even those that have their
own appdata.

This can change once there is the capability to access
appdata from multiple branches of the same runtime, either by
improved appstream api or by implementing this ourselves.

usr/lib/linuxmint/mintUpdate/Classes.py

@@ -451,7 +451,7 @@ def __init__(self, op=None, installer=None, ref=None, installed_ref=None, remote
 
         if pkginfo:
             self.name = installer.get_display_name(pkginfo)
-        elif installed_ref:
+        elif installed_ref and self.flatpak_type != "runtime":
             self.name = installed_ref.get_appdata_name()
         else:
             self.name = ref.get_name()