Re-enables render operations after a call to the RichEditCommands.beginUpdate method and forces immediate re-rendering.
The Rich Edit allows a sequence of operations that affect a document or the control to be performed without having the control render itself after each modification. To do this, the code performing sequential changes to the rich edit must be enclosed within calls to the endUpdate and
endUpdate methods. This improves performance and avoids unnecessary render operations.
Refer to the following section for more information: How to Process a Batch of Commands without Intermediate Updates.