[android] Add support of dark mode for how to edit oh html file

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

android/app/build.gradle

@@ -304,8 +304,8 @@ android {
             "ru",
             "sl",
             "sk",
-            "sr-rCyrl",
-            "sr-rLatn",
+            "sr",
+            "b+sr+Latn",
             "sv",
             "sw",
             "ta",

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

@@ -197,8 +197,10 @@ 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)));
-      items.add(new MenuBottomSheetItem(R.string.delete, R.drawable.ic_delete,
-                                        () -> onDeleteActionSelected(mSelectedCategory)));
+      // Disallow deleting the last category
+      if (getAdapter().getBookmarkCategories().size() > 1)
+        items.add(new MenuBottomSheetItem(R.string.delete, R.drawable.ic_delete,
+                                          () -> onDeleteActionSelected(mSelectedCategory)));
     }
     return items;
   }
@@ -295,24 +297,8 @@ public class BookmarkCategoriesFragment extends BaseMwmRecyclerFragment<Bookmark
 
   private void onDeleteActionSelected(@NonNull BookmarkCategory category)
   {
-    // 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.yes, ((dialog, which) -> {
-                    onAddButtonClick();
-                    BookmarkManager.INSTANCE.deleteCategory(category.getId());
-                    getAdapter().notifyDataSetChanged();
-                }))
-                .setNegativeButton(android.R.string.no,(dialog, which) -> dialog.dismiss())
-                .show();
-    }
+    BookmarkManager.INSTANCE.deleteCategory(category.getId());
+    getAdapter().notifyDataSetChanged();
   }
 
   private void onSettingsActionSelected(@NonNull BookmarkCategory category)

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

@@ -975,5 +975,4 @@
     <string name="download_resources_custom_url_message">Override the default map download server used for map downloads. Leave empty to use CoMaps default server.</string>
     <string name="download_resources_custom_url_summary_none">Not set</string>
     <string name="download_resources_custom_url_error_scheme">Please enter a URL starting with http:// or https://</string>
-    <string name="unable_to_delete_list">The app cannot work without at least one list. Do you want to remove it and create a new one?</string>
 </resources>

android/app/src/main/res/xml/locales_config.xml

@@ -49,7 +49,7 @@
     <locale android:name="ru" />
     <locale android:name="sl" />
     <locale android:name="sk" />
-    <locale android:name="sr-Cyrl" />
+    <locale android:name="sr" />
     <locale android:name="sr-Latn" />
     <locale android:name="sv" />
     <locale android:name="sw" />

data/opening_hours_how_to_edit.html

@@ -11,6 +11,31 @@
     .example {
     font-weight: bold;
     font-family: monospace;
+	
+    /* Dark mode support. */
+    :root {
+      color-scheme: light dark;
+      --primary-color: black;
+      --secondary-color: #555555;
+      --link-color: #37653F;
+      --background-color: white;
+      --separator-color: #0e0e0e;
+    }
+
+    @media screen and (prefers-color-scheme: dark) {
+      :root {
+        --primary-color: #b5b5b5;
+        --secondary-color: #858585;
+        --link-color: #659464;
+        --background-color: black;
+        --separator-color: #0a0a0a;
+      }
+    }
+
+    html { 
+        color: var(--secondary-color);
+        background-color: var(--background-color);
+	}
   }
   </style>
     <script>