gui: make tw_show_kb non-persistent

Change-Id: Icb3dd2342cc3bdc349aaf933d306b9f5315d1e98
Signed-off-by: z31s1g <z31s1g@googlemail.com>
diff --git a/gui/theme/portrait_mdpi/ui.xml b/gui/theme/portrait_mdpi/ui.xml
index 19f199e..dd09577 100644
--- a/gui/theme/portrait_mdpi/ui.xml
+++ b/gui/theme/portrait_mdpi/ui.xml
@@ -67,8 +67,8 @@
 
 	<variables>
 		<variable name="tw_samsung_navbar" value="0" persist="1"/>
-		<variable name="tw_hide_kb" value="0" persist="1"/>
 
+		<variable name="tw_hide_kb" value="0"/>
 		<variable name="screen_width" value="480"/>
 		<variable name="screen_height" value="800"/>
 		<variable name="status_height" value="30"/>