fix the backpress behavior

app/src/main/java/com/github/libretube/ui/activities/MainActivity.kt

@@ -279,22 +279,6 @@ class MainActivity : BaseActivity() {
                 return true
             }
         })
-
-        searchItem.setOnActionExpandListener(
-            object : MenuItem.OnActionExpandListener {
-                override fun onMenuItemActionExpand(p0: MenuItem): Boolean {
-                    return true
-                }
-
-                override fun onMenuItemActionCollapse(p0: MenuItem): Boolean {
-                    val currentFragmentId = navController.currentDestination?.id
-                    if (currentFragmentId == R.id.searchFragment || currentFragmentId == R.id.searchResultFragment) {
-                        navController.popBackStack()
-                    }
-                    return true
-                }
-            }
-        )
         return super.onCreateOptionsMenu(menu)
     }
 

app/src/main/java/com/github/libretube/ui/activities/SettingsActivity.kt

@@ -18,7 +18,7 @@ class SettingsActivity : BaseActivity() {
         setContentView(binding.root)
 
         binding.backImageButton.setOnClickListener {
-            onBackPressed()
+            onBackPressedDispatcher.onBackPressed()
         }
 
         if (savedInstanceState == null) {

app/src/main/res/layout/fragment_channel.xml

@@ -107,8 +107,6 @@
                     android:id="@+id/channel_recView"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
-                    android:layout_marginStart="10dp"
-                    android:layout_marginEnd="10dp"
                     android:nestedScrollingEnabled="false" />
 
             </RelativeLayout>