Clarify postFindFocus and obviously separate it from the try..catch
Clarify postFindFocus and obviously separate it from the try..catch

decaffeinate-examples/vimium,smblott-github/vimium,mrmr1993/vimium,decaffeinate-examples/vimium,philc/vimium,smblott-github/vimium,poacher2k/vimium,poacher2k/vimium,gdh1995/vimium,philc/vimium,decaffeinate-examples/vimium,smblott-github/vimium,gdh1995/vimium,mrmr1993/vimium,mrmr1993/vimium,philc/vimium,poacher2k/vimium,gdh1995/vimium