gnu: kdeconnect: Fix launching kdeconnect-app.

* gnu/packages/kde.scm (kdeconnect)[inputs]: Add qtgraphicaleffects,
qtquickcontrols, qtquickcontrols2.

gnu/packages/kde.scm

@@ -628,7 +628,10 @@ (define-public kdeconnect
        ("qca" ,qca)
        ("qtbase" ,qtbase)
        ("qtdeclarative" ,qtdeclarative)
+       ("qtgraphicaleffects" ,qtgraphicaleffects)
        ("qtmultimedia" ,qtmultimedia)
+       ("qtquickcontrols" ,qtquickcontrols)
+       ("qtquickcontrols2" ,qtquickcontrols2)
        ("qtx11extras" ,qtx11extras)))
     (home-page "https://community.kde.org/KDEConnect")
     (synopsis "Enable your devices to communicate with each other")