change gp target to drop-down

web/kiri/output-gcode.html

@@ -41,7 +41,10 @@
         <tr><th colspan="2"><button id="print-gridprint">send to grid:print</button></th></tr>
         <tr><th>host:port</th><td><input id="grid-host" size="35" placeholder="http(s)://host:port" /></td></tr>
         <tr id="gpapik"><th>api key</th><td><input id="grid-apik" size="35" /></td></tr>
-        <tr><th>target</th><td><input id="grid-target" size="35" /></td></tr>
+        <tr><th>target</th><td>
+            <!--<input id="grid-target" size="35" />-->
+            <select id="grid-target"></select>
+        </td></tr>
         <tr><td colspan="2"><span id="grid-hint">setup <a href="https://github.com/stewartoallen/grid-print" target="_help">grid:print</a> for your network</span></td></tr>
     </table>
 </div>

web/kiri/style.css

@@ -188,12 +188,6 @@ input[type=range]::-moz-focus-outer {
     color: #fff;
     background-color: #888;
 }
-#opapik {
-    display: none;
-}
-#gpapik {
-    display: none;
-}
 
 /** sender dialog */