Minor fixes

- Fix categories modal showing when adding from source with no categories
- Use old categories icon in library bottom action menu

(cherry picked from commit 688cc64dff)

# Conflicts:
#	app/src/main/java/eu/kanade/presentation/components/MangaBottomActionMenu.kt
#	app/src/main/java/eu/kanade/tachiyomi/App.kt

app/src/main/java/exh/favorites/FavoritesSyncHelper.kt

@@ -201,6 +201,7 @@ class FavoritesSyncHelper(val context: Context) {
 
     private suspend fun applyRemoteCategories(categories: List<String>) {
         val localCategories = getCategories.await()
+            .filterNot(Category::isSystemCategory)
 
         categories.forEachIndexed { index, remote ->
             val local = localCategories.getOrElse(index) {
@@ -346,6 +347,7 @@ class FavoritesSyncHelper(val context: Context) {
 
         val insertedMangaCategories = mutableListOf<Pair<Long, Manga>>()
         val categories = getCategories.await()
+            .filterNot(Category::isSystemCategory)
 
         // Apply additions
         throttleManager.resetThrottle()