Implement upgrader for Map version 5

Change-Id: I65db61ca7fa1f9652e84c814208f333f331f5831

appinventor/appengine/src/com/google/appinventor/client/youngandroid/YoungAndroidFormUpgrader.java

@@ -1538,14 +1538,16 @@ public final class YoungAndroidFormUpgrader {
 
   private static int upgradeMapProperties(Map<String, JSONValue> componentProperties,
     int srcCompVersion) {
-    if (srcCompVersion < 4) {
+    if (srcCompVersion < 5) {
       // Version 2
       // The Markers property (blocks-only) was renamed to Features
       // Version 3
       // Block event handlers were renamed
       // Version 4
       // The Rotation property was added with default 0.0 (due north)
-      srcCompVersion = 4;
+      // Verison 5
+      // The ScaleUnits and ShowScale properties were added
+      srcCompVersion = 5;
     }
     return srcCompVersion;
   }

appinventor/blocklyeditor/src/versioning.js

@@ -1862,7 +1862,11 @@ Blockly.Versioning.AllUpgradeMaps =
 
     // AI2:
     // - The Rotation property was added to Map
-    4: "noUpgrade"
+    4: "noUpgrade",
+
+    // AI2:
+    // - The ScaleUnits and ShowScale properties were added to Map
+    5: "noUpgrade"
 
   }, // End Map upgraders