Avoid showing uninstalled source as last used

app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/SourcePresenter.kt

@@ -94,6 +94,7 @@ class SourcePresenter(
     fun updateSources() {
         sources = getEnabledSources()
         loadSources()
+        loadLastUsedSource()
     }
 
     /**