chore: Apply suggestions from code review

Author: mcdurdin

common/schemas/keyman-touch-layout/README.md

@@ -404,7 +404,11 @@ and `width`.
 : Boolean. Defaults to `false`. If true, this will be the default key when the
   user longpresses the base key without moving their finger. Only one subkey
   should be default; if multiple subkeys have the default field set, then
-  behaviour is undefined.
+  behaviour is undefined.  Given that cancel is not the preferred default
+  action for a longpress, the user can cancel the longpress default by 
+  sliding outside the 'acceptance' area -- e.g. south of the key cap, 
+  which would then unhighlight the default and indicate visually that 
+  no output would occur when they release their finger.
 
 ## `flick` object
 

developer/src/tike/xml/layoutbuilder/builder.xsl

@@ -248,7 +248,7 @@
           <select id='selSubKeyNextLayer'></select>
         </div>
         <div class='toolbar-item'>
-          <label for='chkSubKeyIsDefault'>Is default:</label>
+          <label for='chkSubKeyIsDefault'>Default selection:</label>
           <input id='chkSubKeyIsDefault' type='checkbox' />
         </div>
       </div>