feat: dark theme

src/app/modules/map/page/map-page.scss

@@ -1,5 +1,5 @@
 /*!
- * Copyright (C) 2022 StApps
+ * Copyright (C) 2023 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -87,18 +87,10 @@ div.map-buttons {
   ion-button {
     margin: 4px;
     // important for iOS
+    // TODO: find an option that is better suited for the iOS theme
     --box-shadow: var(--map-box-shadow);
     align-self: flex-end;
   }
-
-  ion-button::part(native) {
-    background: white;
-  }
-
-  ion-button::part(native):hover,
-  ion-button::part(native):focus {
-    background: whitesmoke;
-  }
 }
 
 div.map-buttons.above {

src/app/modules/map/widget/map-widget.scss

@@ -1,3 +1,18 @@
+/*!
+ * Copyright (C) 2023 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 div.map-container {
   height: 100%;
   width: 100%;