Fix MangaController toolbar title showing when editing category (#6005)

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt

@@ -53,6 +53,7 @@ import eu.kanade.tachiyomi.source.LocalSource
 import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.source.online.HttpSource
+import eu.kanade.tachiyomi.ui.base.controller.DialogController
 import eu.kanade.tachiyomi.ui.base.controller.FabController
 import eu.kanade.tachiyomi.ui.base.controller.NucleusController
 import eu.kanade.tachiyomi.ui.base.controller.getMainAppBarHeight
@@ -177,7 +178,7 @@ class MangaController :
 
     private var trackSheet: TrackSheet? = null
 
-    private var dialog: MangaFullCoverDialog? = null
+    private var dialog: DialogController? = null
 
     /**
      * For [recyclerViewUpdatesToolbarTitleAlpha]
@@ -583,8 +584,7 @@ class MangaController :
                     }
                 }.toTypedArray()
 
-                ChangeMangaCategoriesDialog(this, listOf(manga), categories, preselected)
-                    .showDialog(router)
+                showChangeCategoryDialog(manga, categories, preselected)
             }
         }
 
@@ -637,8 +637,21 @@ class MangaController :
                 QuadStateTextView.State.UNCHECKED.ordinal
             }
         }.toTypedArray()
-        ChangeMangaCategoriesDialog(this, listOf(manga), categories, preselected)
-            .showDialog(router)
+        showChangeCategoryDialog(manga, categories, preselected)
+    }
+
+    private fun showChangeCategoryDialog(manga: Manga, categories: List<Category>, preselected: Array<Int>) {
+        if (dialog != null) return
+        dialog = ChangeMangaCategoriesDialog(this, listOf(manga), categories, preselected)
+        dialog?.addLifecycleListener(
+            object : LifecycleListener() {
+                override fun postDestroy(controller: Controller) {
+                    super.postDestroy(controller)
+                    dialog = null
+                }
+            }
+        )
+        dialog?.showDialog(router)
     }
 
     override fun updateCategoriesForMangas(mangas: List<Manga>, addCategories: List<Category>, removeCategories: List<Category>) {
@@ -822,7 +835,7 @@ class MangaController :
 
     fun onSetCoverSuccess() {
         mangaInfoAdapter?.notifyDataSetChanged()
-        dialog?.setImage(manga)
+        (dialog as? MangaFullCoverDialog)?.setImage(manga)
         activity?.toast(R.string.cover_updated)
     }