[android] Add a new alert dialog when we remove the last list

Signed-off-by: Jean-Baptiste <jeanbaptiste.charron@outlook.fr>

android/app/src/main/java/app/organicmaps/bookmarks/BookmarkCategoriesFragment.java

@@ -197,10 +197,8 @@ public class BookmarkCategoriesFragment extends BaseMwmRecyclerFragment<Bookmark
                                         () -> onShareActionSelected(mSelectedCategory, KmlFileType.Text)));
       items.add(new MenuBottomSheetItem(R.string.export_file_gpx, R.drawable.ic_file_gpx,
                                         () -> onShareActionSelected(mSelectedCategory, KmlFileType.Gpx)));
-      // Disallow deleting the last category
-      if (getAdapter().getBookmarkCategories().size() > 1)
-        items.add(new MenuBottomSheetItem(R.string.delete, R.drawable.ic_delete,
-                                          () -> onDeleteActionSelected(mSelectedCategory)));
+      items.add(new MenuBottomSheetItem(R.string.delete, R.drawable.ic_delete,
+                                        () -> onDeleteActionSelected(mSelectedCategory)));
     }
     return items;
   }
@@ -297,8 +295,19 @@ public class BookmarkCategoriesFragment extends BaseMwmRecyclerFragment<Bookmark
 
   private void onDeleteActionSelected(@NonNull BookmarkCategory category)
   {
-    BookmarkManager.INSTANCE.deleteCategory(category.getId());
-    getAdapter().notifyDataSetChanged();
+    // Disallow deleting the last category
+    if ((getAdapter().getBookmarkCategories().size() > 1))
+    {
+        BookmarkManager.INSTANCE.deleteCategory(category.getId());
+        getAdapter().notifyDataSetChanged();
+    }
+    else
+    {
+        new MaterialAlertDialogBuilder(requireActivity())
+                .setMessage(R.string.unable_to_delete_list)
+                .setPositiveButton(android.R.string.ok, (dialog, which) -> dialog.dismiss())
+                .show();
+    }
   }
 
   private void onSettingsActionSelected(@NonNull BookmarkCategory category)

android/app/src/main/res/layout/activity_settings.xml

@@ -6,7 +6,7 @@
   android:orientation="vertical">
 
   <include
-    layout="@layout/mtoolbar_default"/>
+    layout="@layout/toolbar_default"/>
 
   <FrameLayout
     android:id="@+id/fragment_container"

android/app/src/main/res/layout/fragment_osm_login.xml

@@ -8,7 +8,7 @@
   android:orientation="vertical">
   <include
     android:id="@+id/toolbar"
-    layout="@layout/mtoolbar_default" />
+    layout="@layout/toolbar_default" />
   <ScrollView
     android:id="@+id/scrollView"
     android:layout_width="match_parent"

android/app/src/main/res/layout/mtoolbar_default.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<com.google.android.material.appbar.MaterialToolbar
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/toolbar"
-    style="@style/MwmWidget.M3.ToolbarStyle"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:minHeight="?attr/actionBarSize" />

android/app/src/main/res/values/strings.xml

@@ -974,4 +974,5 @@
     <string name="download_resources_custom_url_hint">https://cdn-fi-1.comaps.app/</string>
     <string name="download_resources_custom_url_summary_none">Not set</string>
     <string name="download_resources_custom_url_error_scheme">Please enter a full URL starting with https:// and ending with /</string>
+    <string name="unable_to_delete_list">The last list cannot be deleted. Create a new list to remove it</string>
 </resources>

android/app/src/main/res/values/styles.xml

@@ -396,11 +396,4 @@
         <item name="cornerSizeTopLeft">50%</item>
         <item name="cornerSizeTopRight">50%</item>
     </style>
-
-    <style name="MwmWidget.M3.ToolbarStyle" parent="Widget.Material3.Toolbar">
-        <item name="android:background">?android:attr/colorBackground</item>
-        <item name="android:displayOptions">homeAsUp|showTitle</item>
-        <item name="contentInsetStart">0dp</item>
-        <item name="buttonGravity">center_vertical</item>
-    </style>
 </resources>

data/countries_meta.txt

@@ -1,10 +1,4 @@
 {
-"World": {
- "languages": ["int_name", "en", "default"]
-},
-"WorldCoasts": {
- "languages": ["int_name", "en", "default"]
-},
 "Abkhazia": {
  "languages": ["ab", "ru"]
 },