Hide the rulers in Writer by default for a cleaner look

This is consistent with Impress. Might need to be discussed with ux-advise

Change-Id: Icbe719207410d952c76d96c84450fd5a5831ea15
Reviewed-on: https://gerrit.libreoffice.org/956Reviewed-by: Radek Doulík <rodo@novell.com>
Tested-by: Radek Doulík <rodo@novell.com>

officecfg/registry/schema/org/openoffice/Office/Writer.xcs

@@ -1362,7 +1362,7 @@
 						<desc>Specifies whether rulers are displayed. Filters the values of HorizontalRuler and VerticalRuler.</desc>
 						<label>Show rulers</label>
 					</info>
-					<value>true</value>
+					<value>false</value>
 				</prop>
 				<prop oor:name="HorizontalRuler" oor:type="xs:boolean" oor:nillable="false">
 					<!-- OldPath: Writer/Layout/Window -->