[PRQ#61243] Merge Request for mate-multiload-ng-applet-gtk3

PhotonX [1] filed a request to merge mate-multiload-ng-applet-gtk3 [2] into mate-multiload-ng-applet-gtk2 [3]: The mate-panel-gtk2 dependency isn't available any more. I'd propose to delete mate-multiload-ng-applet-gtk2 and rename mate-multiload-ng- applet-gtk3 to mate-multiload-ng-applet. [1] https://aur.archlinux.org/account/PhotonX/ [2] https://aur.archlinux.org/pkgbase/mate-multiload-ng-applet-gtk3/ [3] https://aur.archlinux.org/pkgbase/mate-multiload-ng-applet-gtk2/