Editing class operations does not work. (#337)

Create a new class.

Select it and click 'Add Operation' from the onsceen shortcut menu.

The operation is initially displayed in reverse, with empty argument parenthesis at the front and visibility modifier at the end.

Edit the operation name, then attempt to add operation arguments.

Adding an operation argument results in the creation of a second set of argument parenthesis!

Attempt to add an operation return value. At this point the cursor goes into reverse where pressing the right arrow moves the cursor to the left, and vice versa.

Completely unusable. Reverting to earlier version.