tinymce/tinymce — pull request #169 by usualoma (2013-01-07 01:56:09+00:00)
Title: Stop calling "focus" if a target iframe already has focus.

In IE10, if "focus" is applied to an iframe window, it becomes impossible to get the right range.

# Steps to reproduce this bug
1. Input `

test 123

`.
2. Select from very top of the document to "p" element.
3. Click "Bold" button.

# Expected
* `

test 123

`

# Result
* `

test 123

`

# Screencast
http://www.screencast.com/t/lUYp228dg

# Comment
Although this bug seldom occurs when the default content_css is used,
but when the custom content_css that has a large margin is being used, it occurs frequently.