[Ayatana] The Unity launcher window matching policy

[Conscious User <conscioususer@xxxxxxx>]

Hello,

I was thinking about filing a bug (perhaps multiple, per-app
bugs) to track all applications in the Ubuntu repositories
(or at least all applications in a default install) whose
windows are not being currently correctly matched to a
.desktop file in the Unity launcher, causing ugly icons and
inability to pin to the dock.

Some examples: policykit, bluetooth-wizard, evolution-backup...

But I can't do that accurately without knowing the exact policy
for window matching that the launcher is using. Jason, is it
doing exactly the same as Docky (looking for .desktop files
according to the window class and using StartupWMClass for
corner cases like Java apps, iirc) I wanted to post in every
report the exact procedure to fix.

I was originally going to post this in the ayatana-dev list,
but this can raise some conceptual issues (ex: should all
windows be pinnable?)