confirm popup styling

luasrc/view/tasks/docker.htm

@@ -18,12 +18,12 @@ if self.task_start_failed then
 
 <%+cbi/map%>
 
-<div id="customModal" class="alert-message warning" style="display:none;">
-    "This will permanently delete your installation, are you sure?"
-    <a href="javascript:void(0)" onclick="proceedRemoval()">Yes</a> /
-    <a href="javascript:void(0)" onclick="closeRemoveConfirmation()">No</a>
+<div id="customModal" class="alert-message warning" style="display:none; text-align: center;">
+    <strong style="text-transform: uppercase;">This will permanently delete your installation, are you sure?</strong>
+    <br>
+    <input class="btn cbi-button cbi-button-apply" type="button" value="YES" onclick="proceedRemoval()" style="margin-right: 10px;">
+    <input class="btn cbi-button" type="button" value="NO" onclick="closeRemoveConfirmation()">
 </div>
-
 <div class="cbi-page-actions control-group">
 <%
     if not task_running then