Fixes #88 by doing a version check and only deleting the last time if version < 7.8

Author: mattbrailsford

src/Our.Umbraco.DocTypeGridEditor/Web/UI/App_Plugins/DocTypeGridEditor/Js/doctypegrideditor.controllers.js

@@ -184,8 +184,9 @@ angular.module("umbraco").controller("Our.Umbraco.DocTypeGridEditor.Dialogs.DocT
         "formHelper",
         "contentResource",
         "Our.Umbraco.DocTypeGridEditor.Resources.DocTypeGridEditorResources",
+        "Our.Umbraco.DocTypeGridEditor.Services.DocTypeGridEditorUtilityService",
 
-        function ($scope, $interpolate, formHelper, contentResource, dtgeResources) {
+        function ($scope, $interpolate, formHelper, contentResource, dtgeResources, dtgeUtilityService) {
 
             $scope.docTypes = [];
             $scope.dialogMode = "selectDocType";
@@ -206,8 +207,11 @@ angular.module("umbraco").controller("Our.Umbraco.DocTypeGridEditor.Dialogs.DocT
 
             function loadNode() {
                 contentResource.getScaffold(-20, $scope.model.dialogData.docTypeAlias).then(function (data) {
-                    // Remove the last tab
-                    data.tabs.pop();
+
+                    if (dtgeUtilityService.compareCurrentUmbracoVersion("7.8", { zeroExtend: true }) < 0) {
+                        // Remove the last tab
+                        data.tabs.pop();
+                    }
 
                     // Merge current value
                     if ($scope.model.dialogData.value) {

src/Our.Umbraco.DocTypeGridEditor/Web/UI/App_Plugins/DocTypeGridEditor/Js/doctypegrideditor.services.js

@@ -0,0 +1,63 @@
+angular.module('umbraco.services').factory('Our.Umbraco.DocTypeGridEditor.Services.DocTypeGridEditorUtilityService', function () {
+
+    function compareCurrentUmbracoVersion(v, options) {
+        return this.compareVersions(Umbraco.Sys.ServerVariables.application.version, v, options);
+    }
+
+    function compareVersions(v1, v2, options) {
+
+        var lexicographical = options && options.lexicographical,
+            zeroExtend = options && options.zeroExtend,
+            v1parts = v1.split('.'),
+            v2parts = v2.split('.');
+
+        function isValidPart(x) {
+            return (lexicographical ? /^\d+[A-Za-z]*$/ : /^\d+$/).test(x);
+        }
+
+        if (!v1parts.every(isValidPart) || !v2parts.every(isValidPart)) {
+            return NaN;
+        }
+
+        if (zeroExtend) {
+            while (v1parts.length < v2parts.length) {
+                v1parts.push("0");
+            }
+            while (v2parts.length < v1parts.length) {
+                v2parts.push("0");
+            }
+        }
+
+        if (!lexicographical) {
+            v1parts = v1parts.map(Number);
+            v2parts = v2parts.map(Number);
+        }
+
+        for (var i = 0; i < v1parts.length; ++i) {
+            if (v2parts.length === i) {
+                return 1;
+            }
+
+            if (v1parts[i] === v2parts[i]) {
+                continue;
+            } else if (v1parts[i] > v2parts[i]) {
+                return 1;
+            } else {
+                return -1;
+            }
+        }
+
+        if (v1parts.length !== v2parts.length) {
+            return -1;
+        }
+
+        return 0;
+    }
+
+    var service = {
+        compareCurrentUmbracoVersion: compareCurrentUmbracoVersion,
+        compareVersions: compareVersions
+    };
+
+    return service;
+});