Fixed bottom sheets on lower versions of android

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -578,8 +578,6 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
         const val INTENT_SEARCH_QUERY = "query"
         const val INTENT_SEARCH_FILTER = "filter"
 
-        private const val URL_HELP = "https://tachiyomi.org/help/"
-
         var usingBottomNav = true
             internal set
     }

app/src/main/java/eu/kanade/tachiyomi/util/view/ViewExtensions.kt

@@ -255,7 +255,8 @@ inline fun View.updatePaddingRelative(
 
 fun BottomSheetDialog.setEdgeToEdge(activity: Activity, layout: View, contentView: View,
     setTopMargin: Boolean) {
-    window?.setBackgroundDrawable(null)
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
+        window?.setBackgroundDrawable(null)
     val currentNightMode = activity.resources.configuration.uiMode and Configuration
         .UI_MODE_NIGHT_MASK
     if (currentNightMode == Configuration.UI_MODE_NIGHT_NO)