Remove some minor settings

Some spring cleaning to remove some unnecessary complexity so things are easier to maintain.

- Start screen: redundant with app shortcuts in Android 7.1+
- Jump to chapters: irrelevant in tablet mode and people can scroll a tiny bit if they really have to
- Option to not scroll away bottom nav: issues with fast scroll will be irrelevant with it being replaced or removed in the Compose migrations

Get ready for people malding over their special needs. https://xkcd.com/1172/

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

@@ -265,18 +265,6 @@ class MangaController :
                 .build()
             it.adapter = ConcatAdapter(config, mangaInfoAdapter, chaptersHeaderAdapter, chaptersAdapter)
 
-            // Skips directly to chapters list if navigated to from the library
-            it.post {
-                if (!fromSource && preferences.jumpToChapters()) {
-                    val mainActivityAppBar = (activity as? MainActivity)?.binding?.appbar
-                    (it.layoutManager as LinearLayoutManager).scrollToPositionWithOffset(
-                        1,
-                        mainActivityAppBar?.height ?: 0,
-                    )
-                    mainActivityAppBar?.isLifted = true
-                }
-            }
-
             it.scrollStateChanges()
                 .onEach { _ ->
                     // Disable swipe refresh when view is not at the top