gfse: add Extra and Lexicon to the list of resource modules that can be opened

src/editor/simple/TODO

@@ -28,6 +28,8 @@
 - Allow grammars to contain a resoure module. Create the resource module by
  factoring out common parts of the concrete syntaxes.
 - Integrate example-based concrete syntax construction (using Ramona's tool)
+- Open lexicon modules? They are not installed by default!
+     DictEng, MorphalouFre, DictSwe, DictTur, DictBul, DictFun, DictLav
 
 + compile only the uploaded grammar even if other grammars are present
 + 'flags startcat' is needed for grammars with only one category (since the

src/editor/simple/editor.js

@@ -496,7 +496,7 @@ function draw_concrete(g,i) {
 		  ])
 }
 
-var rgl_modules=["Paradigms","Syntax"];
+var rgl_modules=["Paradigms","Syntax","Lexicon","Extra"];
 
 function add_open(ci) {
     return function (g,el) {