Description of problem:
When I edit a string, the previous string is not shown on translation memory.
It was not like that before the update to 1.5.
This was useful when I edited once and then wanted to check how it was translated before or change it back to previous translation.

Version-Release number of selected component (if applicable): 1.5

How reproducible:


Steps to Reproduce:
1. Edit one string
2. Check translation memory
3. Previous translation will not be shown, only the new translation is there.
  
Actual results:


Expected results:


Additional info: