At the moment, the mobile theme is not intended to be used as the default icon theme on the desktop. Since it has been renamed to Suru, many icons have been added, like edit-clear and preferences-desktop-locale-symbolic.
When Unity 8 will be the default DE, Suru will be pushed as the default icon theme and many missing icons will be fixed by either a new specific asset or a symbolic link to an existing one.
At the moment, the mobile theme is not intended to be used as the default icon theme on the desktop. Since it has been renamed to Suru, many icons have been added, like edit-clear and preferences- desktop- locale- symbolic.
When Unity 8 will be the default DE, Suru will be pushed as the default icon theme and many missing icons will be fixed by either a new specific asset or a symbolic link to an existing one.