Use more discreet Pidgin tray icons in Windows camouflage mode

In camouflage mode, it would nice that pidgin tray icon doesn’t draw attention. If skype or windows messagener has a tray icon, the best would be to mimlic it.

Parent Task: #7377 (closed)

Related issues

Related to #7399 (closed)

Original created by @alant on 7376 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information