Change names of iOS build files

The name subsurface-ios was used in many places and that was just not helpful
to fight against. This should work much better.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

packaging/ios/Subsurface-mobile/MainForm.ui.qml

@@ -0,0 +1,25 @@
+import QtQuick 2.6
+import QtQuick.Controls 1.5
+import QtQuick.Layouts 1.3
+
+Item {
+    width: 640
+    height: 480
+
+    property alias button1: button1
+    property alias button2: button2
+
+    RowLayout {
+        anchors.centerIn: parent
+
+        Button {
+            id: button1
+            text: qsTr("Press Me 1")
+        }
+
+        Button {
+            id: button2
+            text: qsTr("Press Me 2")
+        }
+    }
+}