Fixup reboot after install variables

* Create correctly named data manager variable 'tw_install_reboot'
* Make configurable through Settings
* Remove closing tag space in theme files (not personal preference,
  but should match surrounding code style)
* Fix the "two presses needed to enable" issue for the checkbox on the
  install screen

Change-Id: I0ceb60b4888a672e2f0ecb5672b03cc86615621a
diff --git a/gui/theme/common/portrait.xml b/gui/theme/common/portrait.xml
index 507f384..dbd4305 100644
--- a/gui/theme/common/portrait.xml
+++ b/gui/theme/common/portrait.xml
@@ -386,9 +386,9 @@
 			</checkbox>
 
 			<checkbox>
-				<placement x="%indent%" y="%row13a_y%" />
+				<placement x="%indent%" y="%row13a_y%"/>
 				<text>{@install_reboot_chk=Reboot after installation is complete}</text>
-				<data variable="tw_install_reboot" />
+				<data variable="tw_install_reboot"/>
 			</checkbox>
 
 			<checkbox>
@@ -2904,6 +2904,9 @@
 				<listitem name="{@zip_sig_chk=Zip signature verification}">
 					<data variable="tw_signed_zip_verify"/>
 				</listitem>
+				<listitem name="{@install_reboot_chk=Reboot after installation is complete}">
+					<data variable="tw_install_reboot"/>
+				</listitem>
 				<listitem name="{@use_rmrf_chk=Use rm -rf instead of formatting}">
 					<data variable="tw_rm_rf"/>
 				</listitem>