Allow opening locations in your preferred map

Once someone shares a location with you, typically you want to open it
in your preferred mapping application or website. For example, being
sent a location to a restaurant and needing to route it via Google Maps.

Now in NeoChat you can click on the "Open Externally" button on a
location message. On KDE Plasma, the default application can be set
under System Settings. On Android, this URI is handled by Google Maps
and possibly others.

src/timeline/LocationComponent.qml

@@ -9,6 +9,7 @@ import QtLocation
 import QtPositioning
 
 import org.kde.neochat
+import org.kde.kirigami as Kirigami
 
 /**
  * @brief A component to show a location from a message.
@@ -101,6 +102,18 @@ ColumnLayout {
                 Qt.openUrlExternally(link);
             }
         }
+
+        Button {
+            anchors {
+                top: parent.top
+                right: parent.right
+                margins: Kirigami.Units.smallSpacing
+            }
+
+            text: i18nc("@action:button Open the location in an external program", "Open Externally")
+            icon.name: "compass"
+            onClicked: Qt.openUrlExternally("geo:" + root.latitude + "," + root.longitude)
+        }
     }
     Component {
         id: fullScreenMap