web: flatten image dir

hledger-web/Hledger/Web/App.hs

@@ -679,7 +679,7 @@ addform td = [$hamlet|
 %script!type=text/javascript
  $$(document).ready(function() {
     /* dhtmlxcombo setup */
-    window.dhx_globalImgPath="../static/images/";
+    window.dhx_globalImgPath="../static/";
     var desccombo  = new dhtmlXCombo("description");
     var acct1combo = new dhtmlXCombo("account1");
     var acct2combo = new dhtmlXCombo("account2");

hledger-web/hledger-web.cabal

@@ -23,7 +23,7 @@ data-files:
                 static/dhtmlxcommon.js
                 static/dhtmlxcombo.js
                 static/favicon.ico
-                static/images/combo_select.gif
+                static/combo_select.gif
                 templates/addform.hamlet
                 templates/addformpostingfields.hamlet
                 templates/default-layout.cassius