Add option to disable scroll offset changing modifier

indra/newview/app_settings/settings.xml

@@ -8,7 +8,17 @@
 		<string>settings_sh.xml</string>
 		<string>settings_rlv.xml</string>
 	</array>
-
+    <key>SinguOffsetScrollKeys</key>
+    <map>
+      <key>Comment</key>
+      <string>Enable keys to modify camera and focus offsets</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>1</integer>
+    </map>
     <key>PhoenixIMAnnounceStealFocus</key>
     <map>
       <key>Comment</key>