Mailwatch plugin should use selected theme icons

Submitted by Laurent Pointecouteau

Assigned to Ján Sučan

Link to original bug (#7429)

Description

Currently, xfce4-mailwatch-plugin requires the user to manually change its icons, which can lead to painful searches into /usr/share/icons folders each time one wants to change his icon theme. Plus, default icons (from the old Rodent icon theme) are ugly.

Icons shoud automatically fit to the selected icon theme, by using freedesktop naming specification (for example, /status/mail-unread-symbolic.png - I also saw some themes using the /panel/applications-email-panel.png format, but I doubt this is standards-compliant).

Version: 1.1.0 or older