Use the right insets in the home screen UI (#7271)

* Use the right insets in the home screen UI

That's `WindowInsets.statusBar` for the `Scaffold` component, then `WindowInsets.navigationBar` for the `LazyColum.contentPadding`

* Apply it to other screens with long lists of items too

* Apply the insets to `PreferencePage` too

* Apply inset changes to other screens with scrollable content

* Add helper insets/padding values based on review suggestions.

* Use the newly added insets/padding values in several scaffold and scrollable columns

---------

Co-authored-by: ElementBot <android@element.io>

libraries/roomselect/impl/src/main/kotlin/io/element/android/libraries/roomselect/impl/RoomSelectView.kt

@@ -53,6 +53,8 @@ import io.element.android.libraries.designsystem.theme.components.Text
 import io.element.android.libraries.designsystem.theme.components.TextButton
 import io.element.android.libraries.designsystem.theme.components.TopAppBar
 import io.element.android.libraries.designsystem.utils.OnVisibleRangeChangeEffect
+import io.element.android.libraries.designsystem.utils.lazyColumnContentPadding
+import io.element.android.libraries.designsystem.utils.scaffoldScrollableContentInsets
 import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.ui.components.SelectedRoom
 import io.element.android.libraries.matrix.ui.model.SelectRoomInfo
@@ -133,7 +135,8 @@ fun RoomSelectView(
                     )
                 }
             )
-        }
+        },
+        contentWindowInsets = scaffoldScrollableContentInsets,
     ) { paddingValues ->
         Column(
             Modifier
@@ -149,7 +152,10 @@ fun RoomSelectView(
                 resultState = state.resultState,
                 showBackButton = false,
             ) { summaries ->
-                LazyColumn(state = lazyListState) {
+                LazyColumn(
+                    state = lazyListState,
+                    contentPadding = lazyColumnContentPadding,
+                ) {
                     item {
                         SelectedRoomsHelper(
                             selectedRooms = state.selectedRooms,