Renamed showExtraKeys to toggleExtraKeys

include/base.css

@@ -442,7 +442,7 @@ html {
   margin-left: 0px;
 }
 
-#showExtraKeysButton { display: none; }
+#toggleExtraKeysButton { display: none; }
 #toggleCtrlButton { display: inline; }
 #toggleAltButton {  display: inline; }
 #sendTabButton { display: inline; }
@@ -476,7 +476,7 @@ html {
     padding-right: 0px;
   }
   /* collapse the extra keys on lower resolutions */
-  #showExtraKeysButton {
+  #toggleExtraKeysButton {
     display: inline;
   }
   #toggleCtrlButton {

include/ui.js

@@ -211,7 +211,7 @@ var UI;
             $D("keyboardinput").onblur = UI.keyInputBlur;
             $D("keyboardinput").onsubmit = function () { return false; };
 
-            $D("showExtraKeysButton").onclick = UI.showExtraKeys;
+            $D("toggleExtraKeysButton").onclick = UI.toggleExtraKeys;
             $D("toggleCtrlButton").onclick = UI.toggleCtrl;
             $D("toggleAltButton").onclick = UI.toggleAlt;
             $D("sendTabButton").onclick = UI.sendTab;
@@ -1159,21 +1159,21 @@ var UI;
             UI.hideKeyboardTimeout = setTimeout(function() { UI.setKeyboard(); },100);
         },
 
-        showExtraKeys: function() {
+        toggleExtraKeys: function() {
             UI.keepKeyboard();
             if(UI.extraKeysVisible === false) {
                 $D('toggleCtrlButton').style.display = "inline";
                 $D('toggleAltButton').style.display = "inline";
                 $D('sendTabButton').style.display = "inline";
                 $D('sendEscButton').style.display = "inline";
-                $D('showExtraKeysButton').className = "noVNC_status_button_selected";
+                $D('toggleExtraKeysButton').className = "noVNC_status_button_selected";
                 UI.extraKeysVisible = true;
             } else if(UI.extraKeysVisible === true) {
                 $D('toggleCtrlButton').style.display = "";
                 $D('toggleAltButton').style.display = "";
                 $D('sendTabButton').style.display = "";
                 $D('sendEscButton').style.display = "";
-                $D('showExtraKeysButton').className = "noVNC_status_button";
+                $D('toggleExtraKeysButton').className = "noVNC_status_button";
                 UI.extraKeysVisible = false;
             }
         },

vnc.html

@@ -74,8 +74,8 @@
                     autocorrect="off" autocomplete="off" spellcheck="false"
                     mozactionhint="Enter"></textarea>
                 <div id="noVNC_extra_keys">
-                    <input type="image" alt="Extra keys" src="images/showextrakeys.png"
-                        id="showExtraKeysButton" class="noVNC_status_button">
+                    <input type="image" alt="Extra keys" src="images/toggleextrakeys.png"
+                        id="toggleExtraKeysButton" class="noVNC_status_button">
                     <input type="image" alt="Ctrl" src="images/ctrl.png"
                         id="toggleCtrlButton" class="noVNC_status_button">
                     <input type="image" alt="Alt" src="images/alt.png"