Added better match when using graphite function autocomplete, hit tab key and…

Added better match when using graphite function autocomplete, hit tab key and the first match will be used, you no longer need to use the down arrow to select the typeahead match you want, just hit tab key

src/app/directives/addGraphiteFunc.js

@@ -38,6 +38,14 @@ function (angular, app, _, $, gfunc) {
             items: 10,
             updater: function (value) {
               var funcDef = gfunc.getFuncDef(value);
+              if (!funcDef) {
+                // try find close match
+                funcDef = _.find(allFunctions, function(funcName) {
+                  return funcName.toLowerCase().indexOf(value) === 0;
+                });
+
+                if (!funcDef) { return; }
+              }
 
               $scope.$apply(function() {
                 $scope.addFunction(funcDef);