Add a 'reenter' stack frame command

[nlfiedler]

What steps will reproduce the problem?

1. Write a progam with a method that has several lines of code and that gets called from the main program or another method.
2. Step into the method and to the middle of it, or set a breakpoint there and run the program till it stops there.
3. There is no obviaus way, no way at all that I can see, to start that method call over again without starting over again in some sense, though the Java debugging interface supports starting the call over again from where you are.

What is the expected output? What do you see instead?
There should be a menu command and button for reentering the stack frame you are currently focused on while debugging, even if you've moved down the stack to a caller.

What version of the product are you using? On what operating system?
I'm using JSwat 4.5 on Windows 7, 64 bit.

Please provide any additional information below.
In a large program this feature is a real time saver, particularly for reentering methods that have no side effects. It allows you to go back and watch in more detail a bug that you stepped over the first time. You can do this without having to go back and start all over again, which can be time consuming or, in some circumstances, difficult to do.