change 'modal' wording to something more general and less jargony

lms/templates/modal/_modal-settings-language.html

@@ -10,7 +10,7 @@
     <button class="close-modal">&#10005;
       <span class="sr">
         ## Translators: this is a control to allow users to exit out of this modal interface (a menu or piece of UI that takes the full focus of the screen)
-        ${_('Close Modal')}
+        ${_('Close')}
       </span>
     </button>
 
@@ -19,7 +19,7 @@
         <span id="change_language_title">${_("Change Preferred Language")}</span>
         <span class="sr">,
           ## Translators: this text gives status on if the modal interface (a menu or piece of UI that takes the full focus of the screen) is open or not
-          ${_("modal open")}
+          ${_("window open")}
         </span>
       </h2>
       <hr/>