Added ability to search manga titles in collasped category

app/src/main/java/eu/kanade/tachiyomi/data/database/models/LibraryManga.kt

@@ -15,8 +15,10 @@ class LibraryManga : MangaImpl() {
             category = categoryId
         }
 
-        fun createHide(categoryId: Int): LibraryManga = createBlank(categoryId).apply {
+        fun createHide(categoryId: Int, title: String): LibraryManga =
-            status = -1
+            createBlank(categoryId).apply {
-        }
+                    this.title = title
+                    status = -1
+                }
     }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryItem.kt

@@ -130,7 +130,7 @@ class LibraryItem(
      * @return true if the manga should be included, false otherwise.
      */
     override fun filter(constraint: String): Boolean {
-        if (manga.isBlank())
+        if (manga.isBlank() && manga.title.isBlank())
             return constraint.isEmpty()
         val sourceManager by injectLazy<SourceManager>()
         val sourceName = if (manga.source == 0L) "Local" else

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.kt

@@ -443,11 +443,15 @@ class LibraryPresenter(
                         )
                     )
                 } else if (catId in categoriesHidden) {
-                    items.removeAll { it.manga.category == catId }
+                    val mangaToRemove = items.filter { it.manga.category == catId }
+                    val mergedTitle = mangaToRemove.joinToString("-") {
+                        it.manga.title
+                    }
+                    items.removeAll(mangaToRemove)
                     val headerItem = headerItems[catId]
                     if (headerItem != null) items.add(
                         LibraryItem(
-                            LibraryManga.createHide(catId),
+                            LibraryManga.createHide(catId, mergedTitle),
                             libraryLayout,
                             preferences.uniformGrid(),
                             preferences.alwaysShowSeeker(),