Finish creating disable_free_space_check variable

* Create data manager variable for 'tw_disable_free_space'
* Make configurable through Settings
* Fix the "two presses needed to enable" issue for the checkbox on the
  backup screen
* No need to capitalize every word, but do specify precedes backup

Change-Id: Id436cef13e4ca9349618420aac03862ec4e3c35e
diff --git a/gui/theme/common/watch.xml b/gui/theme/common/watch.xml
index 38a2a23..fd60487 100644
--- a/gui/theme/common/watch.xml
+++ b/gui/theme/common/watch.xml
@@ -1930,7 +1930,7 @@
 				<listitem name="{@skip_md5_backup_chk=Skip MD5 generation during backup}">
 					<data variable="tw_skip_md5_generate"/>
 				</listitem>
-				<listitem name="{@disable_backup_space_chk=Disable Free Space Check}">
+				<listitem name="{@disable_backup_space_chk=Disable free space check before backup}">
 					<data variable="tw_disable_free_space"/>
 				</listitem>
 			</listbox>
@@ -2119,7 +2119,7 @@
 				<listitem name="{@skip_md5_backup_chk=Skip MD5 generation during backup}">
 					<data variable="tw_skip_md5_generate"/>
 				</listitem>
-				<listitem name="{@disable_backup_space_chk=Disable Free Space Check}">
+				<listitem name="{@disable_backup_space_chk=Disable free space check before backup}">
 					<data variable="tw_disable_free_space"/>
 				</listitem>
 			</listbox>
@@ -3413,6 +3413,9 @@
 				<listitem name="{@use_rmrf_chk=Use rm -rf instead of formatting}">
 					<data variable="tw_rm_rf"/>
 				</listitem>
+				<listitem name="{@disable_backup_space_chk=Disable free space check before backup}">
+					<data variable="tw_disable_free_space"/>
+				</listitem>
 				<listitem name="{@skip_md5_backup_chk=Skip MD5 generation during backup}">
 					<data variable="tw_skip_md5_generate"/>
 				</listitem>