"Force Push" checkbox in Push dialog has fixed position

In the Git Push dialog, there is a 'Force Push' option. The option label and checkbox has a fixed position, so that if you enlarge the dialog window, they do not move as expected. See screenshots for details.

To reproduce:

• Open a Git repository in SouceTree (with a valid remote repo)
• Click on the Push button, so that dialog opens up
• Drag the bottom of the dialog so that expands vertically

Expected behaviour:

• The controls below the Branches window move with the bottom
  of the dialy - Select All, Push All Tags, Force Push, Cancel, OK.

Actual behaviour:

• Everything except 'Force Push' moves as expected. FP stays where it
  was when the window first opened.