Use the Blob login theme in SDDM

bin/blob-plymouth-set

@@ -206,7 +206,7 @@ run_root_transaction() {
     )
     plymouth_default_assets=("${plymouth_theme_assets[@]}" logos/oma.png)
     sddm_theme_assets=(Main.qml bullet.png entry-failed.png entry.png lock-failed.png lock.png logo.png)
-    sddm_default_assets=("${sddm_theme_assets[@]}" metadata.desktop theme.conf)
+    sddm_default_assets=(Main.qml metadata.desktop theme.conf)
 
     plymouth_assets=()
     sddm_assets=()