[SSE] Disable close view button for default sheet mode

apps/spreadsheeteditor/main/app/controller/ViewTab.js

@@ -115,6 +115,9 @@ define([
 
         onSelectionChanged: function(info) {
             if (!this.toolbar.editMode || !this.view) return;
+
+            Common.Utils.lockControls(SSE.enumLock.sheetView, this.api.asc_getActiveNamedSheetView && !this.api.asc_getActiveNamedSheetView(this.api.asc_getActiveWorksheetIndex()),
+                                      {array: [this.view.btnCloseView]});
         },
 
         onFreeze: function(state) {

apps/spreadsheeteditor/main/app/view/Toolbar.js

@@ -97,7 +97,8 @@ define([
         selSlicer: 'sel-slicer',
         cantSort: 'cant-sort',
         pivotLock: 'pivot-lock',
-        tableHasSlicer: 'table-has-slicer'
+        tableHasSlicer: 'table-has-slicer',
+        sheetView: 'sheet-view'
     };
 
     SSE.Views.Toolbar =  Common.UI.Mixtbar.extend(_.extend({

apps/spreadsheeteditor/main/app/view/ViewTab.js

@@ -114,7 +114,7 @@ define([
                         cls         : 'btn-toolbar',
                         iconCls     : 'toolbar__icon btn-sheet-view-close',
                         caption     : this.textClose,
-                        lock        : [_set.coAuth, _set.lostConnect]
+                        lock        : [_set.sheetView, _set.coAuth, _set.lostConnect]
                     });
                     this.lockedControls.push(this.btnCloseView);
                     Common.Utils.injectComponent($host.find('#slot-closeview'), this.btnCloseView);