Support StartupWMClass

Submitted by Khazar

Assigned to Nick Schermer

Link to original bug (#10238)

Description

http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html

Key: StartupWMClass ; Description: If specified, it is known that the application will map at least one window with the given string as its WM class or WM name hint (see the Startup Notification Protocol Specification for more details).

I want to redefine WM_CLASS(STRING) of xfce4-weather-plugin 0.8.3 to xfce4-weather-plugin or Weather Update, instead of having the constant WM_CLASS(STRING) = "wrapper", "Wrapper", by using StartupWMClass key within /usr/share/xfce4/panel/plugins/weather.desktop.

Version: 4.10.0