add support call to action in export dialog

web/kiri/index.css

@@ -1690,6 +1690,14 @@ details[open] summary::after {
     font-family: monospace;
     padding-top: 5px;
 }
+#export-support {
+    padding-top: 10px;
+    text-align: center;
+}
+#export-support a {
+    padding: 5px;
+    border-radius: 2px;
+}
 .mod-print {
     background-color: rgba(255,255,255,0.85);
 }

web/kiri/index.html

@@ -667,6 +667,9 @@
                 </div>
                 <div id="oph1nt"><label class="hint"><a href="http://docs.octoprint.org/en/master/api/general.html?highlight=cors#cross-origin-requests" target="_help">CORS support</a> must be enabled in API settings</label></div>
             </div>
+            <div id="export-support" class="f-col">
+                <a id="export-support-a" target="support">this project neeeds your support!</a>
+            </div>
         </div>
         <div id="mod-x-sla" class="mod-print mdialog f-col">
             <div class="header"><label lk="export">export</label></div>