Fix warnings when building QSR 2.1 application template

The text area was too small on certain platforms where the used font
was not necessarily available. Use more common "Arial" font and increase
the text area size slightly.

Task-number: QSR-2450
Change-Id: If74e807c935b8e82958419e7d5d6254dd551e2cb
Reviewed-by: Teemu Holappa <teemu.holappa@qt.io>

src/plugins/saferenderer/wizards/qsrapp2_1/main.qml.tpl

@@ -13,12 +13,12 @@ Window {
         objectName: "safetextitem"
         x: 206
         y: 208
-        width: 340
-        height: 40
+        width: 380
+        height: 50
         color: "#8ae234"
         fillColor: "black"
         text: "Hello Qt Safe Renderer!"
-        font.family: "Lato"
+        font.family: "Arial"
         horizontalAlignment: Text.AlignLeft
         font.pixelSize: 32
     }