SourceTree on mac is stealing periodically? keyboard focus.

[Rostislav Simonik]

Source tree is periodically stealing keyboard focus from other applications when it's running on background.

Testing scenario

1. Open source tree application with opened specific repository, you can also some repos bookmarked (not sure if it's related) and keep running it on background
2. Open any other application and starts writing. 
3. After some period source tree steals for few milliseconds focus and returns back to given application.  (probably some periodical check on background)

Not desired consequence:

Not all characters you have written in your application are written. 

I've detected that by script which is watching applications that have current active focus.