Swapped the copyright overlay for a simple text view, minor tweaks

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

@@ -1,7 +1,28 @@
 <?xml version="1.0" encoding="utf-8"?>
-<org.osmdroid.views.MapView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/mapView"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".ui.fragments.MapOsmFragment" />
+    tools:context=".ui.fragments.MapOsmFragment">
+
+    <org.osmdroid.views.MapView
+        android:id="@+id/mapView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/osmCopyright"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/osmCopyright"
+        android:textColor="@color/athens_gray"
+        android:textSize="12sp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -170,4 +170,5 @@
     <string name="tle_source">TLE source</string>
     <string name="https_only">Please use HTTPS URLs only</string>
     <string name="placeholder" translatable="false">Placeholder</string>
+    <string name="osmCopyright" translatable="false">Wikimedia maps | Map data © OpenStreetMap contributors</string>
 </resources>