Some crash fixes

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

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.ui.browse.source.browse
 
 import android.os.Bundle
 import eu.davidea.flexibleadapter.items.IFlexible
-import eu.davidea.flexibleadapter.items.ISectionable
 import eu.kanade.tachiyomi.data.cache.CoverCache
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.Category
@@ -321,7 +320,7 @@ open class BrowseSourcePresenter(
                             is Filter.Text -> TextSectionItem(it)
                             is Filter.Select<*> -> SelectSectionItem(it)
                             else -> null
-                        } as? ISectionable<*, *>
+                        }
                     }
                     subItems.forEach { it.header = group }
                     group.subItems = subItems

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

@@ -143,7 +143,7 @@ class LibraryController(
         if (preferences.categoryTabs().get()) {
             currentTitle = resources?.getString(R.string.label_library)
         } else {
-            adapter?.categories?.get(binding.libraryPager.currentItem)?.let {
+            adapter?.categories?.getOrNull(binding.libraryPager.currentItem)?.let {
                 currentTitle = it.name
             }
         }

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

@@ -923,7 +923,7 @@ class MangaController :
     private fun markPreviousAsRead(chapters: List<ChapterItem>) {
         val adapter = chaptersAdapter ?: return
         val prevChapters = if (presenter.sortDescending()) adapter.items.reversed() else adapter.items
-        val chapterPos = prevChapters.indexOf(chapters.last())
+        val chapterPos = prevChapters.indexOf(chapters.lastOrNull())
         if (chapterPos != -1) {
             markAsRead(prevChapters.take(chapterPos))
         }

app/src/main/java/eu/kanade/tachiyomi/ui/webview/BaseWebViewActivity.kt

@@ -36,7 +36,7 @@ open class BaseWebViewActivity : BaseActivity<WebviewActivityBinding>() {
         try {
             binding = WebviewActivityBinding.inflate(layoutInflater)
             setContentView(binding.root)
-        } catch (e: Exception) {
+        } catch (e: Throwable) {
             // Potentially throws errors like "Error inflating class android.webkit.WebView"
             toast(R.string.information_webview_required, Toast.LENGTH_LONG)
             finish()