Fix reboot system on watch theme

Change-Id: I008664109360d937a31232c8cc15c7c9d3dd0ba5
diff --git a/gui/devices/watch/res/watch.xml b/gui/devices/watch/res/watch.xml
index 786049a..1d4e290 100644
--- a/gui/devices/watch/res/watch.xml
+++ b/gui/devices/watch/res/watch.xml
@@ -2167,7 +2167,7 @@
 				<text>Reboot Menu</text>
 			</object>
 
-			<object type="button">
+			<object type="button" style="rebootsystem">
 				<placement x="%col1_x%" y="%row1_y%" />
 				<text>System</text>
 			</object>