Closing the find widget via x does not clear find in selection toggle

[ericksonivanowski]

• VSCode Version: 1.7.2
• OS Version: Windows 10

The selection area of find/replace keeps popping up even after I close the dialog find/replace by pressing the 'close' button.

PS: When the document is not saved, the expected behavior occurs.
When I press ESC the expected behavior also occurs. Only when the document is saved does this bug occur.

Steps to Reproduce:

1. Open New Document

2. Paste:
   Test Select
   Test Select
   Test Select
   Test Select

3. Save document

4. Press Ctrl + A

5. Press Ctrl + F

6. In Dialog Find/Replace press button 'Find in Selection'

7. Press button 'Close' in right of 'Find in Selection'

Steps to reproduce expected:

4. Press Ctrl + A
5. Press Ctrl + F
6. In Dialog Find/Replace press button 'Find in Selection'
7. Press ESC