Implemented moving cursor left/right/home/end in footnotes.

word/Editor/DocumentContent.js

@@ -1873,7 +1873,7 @@ CDocumentContent.prototype.Cursor_MoveToStartPos         = function(AddToSelect)
         this.Content[0].Cursor_MoveToStartPos(false);
     }
 };
-CDocumentContent.prototype.Cursor_MoveToEndPos           = function(AddToSelect)
+CDocumentContent.prototype.Cursor_MoveToEndPos           = function(AddToSelect, StartSelectFromEnd)
 {
     if (true === AddToSelect)
     {
@@ -1906,6 +1906,19 @@ CDocumentContent.prototype.Cursor_MoveToEndPos           = function(AddToSelect)
         }
     }
     else
+    {
+        if (true === StartSelectFromEnd)
+        {
+            this.Selection.Start    = false;
+            this.Selection.Use      = true;
+            this.Selection.StartPos = this.Content.length - 1;
+            this.Selection.EndPos   = this.Content.length - 1;
+            this.Selection.Flag     = selectionflag_Common;
+            this.CurPos.ContentPos  = this.Content.length - 1;
+            this.Set_DocPosType(docpostype_Content);
+            this.Content[this.Content.length - 1].Cursor_MoveToEndPos(false, true);
+        }
+        else
         {
             this.Selection_Remove();
 
@@ -1919,6 +1932,7 @@ CDocumentContent.prototype.Cursor_MoveToEndPos           = function(AddToSelect)
             this.Set_DocPosType(docpostype_Content);
             this.Content[this.CurPos.ContentPos].Cursor_MoveToEndPos(false);
         }
+    }
 };
 CDocumentContent.prototype.Cursor_MoveUp_To_LastRow      = function(X, Y, AddToSelect)
 {