Description of problem:

The simple search function in the editor ("Search Source or Target content") needs a "clear" function that will clear the last search and show all strings again.


Steps to Reproduce:
1. Open any document in workspace
2. Enter search term in search bar at the top, hit Enter
3. n number of results will show
4. In order to clear the search results and view all strings again...:
  
Actual results:
... you need to remove the search term from search bar and hit Enter again. That is at least one mouse click and two keystrokes. 

Expected results:
... you should be able to click a little "x" symbol (or similar) in the search bar. One mouse click.