Description of problem:

If you compose a new message, when mouse at the word needs to be replaced when the front or rear, this word will not be replaced as expected.

Version-Release number of selected component (if applicable):
evolution28
the platform is: x86-64

How reproducible: everytime


Steps to Reproduce:
1. Launch Evolution28
2. compose a new message like this: 
    hello test test world hello
3. click "Edit->Replace"
4. let your mouse behind the first hello.
5. In pop-up window, enter replace "hello" with "test".
6. click " Find and Replace".
  
Actual results:
  After the step 6, you will find the first hello will not be replaced.

Expected results:
  After the step 6, both hello should be replaced with test.

Additional info: