rename 'Clear Storage' to 'Reset' (#55)

it is shorter and makes the control smaller
(which was just grown by adding the title in #54) -
but 'Reset' also fits better as it clears localStorage
as well as reloading the page.

Author: r10s

webxdc.js

@@ -234,7 +234,7 @@ window.alterXdcApp = () => {
       '"> | </span>' +
       '<a id="webxdc-panel-clear" href="javascript:window.clearXdcStorage();" style="' +
       styleMenuLink +
-      '">Clear Storage</a>' +
+      '">Reset</a>' +
       "<div>";
     var controlPanel = root.firstChild;