IE11: Selection is lost when opening dropdowns or menu buttons or inserting tables

[Jakub Ś]

1. Select some text
2. Open dropdown or one of Color Menu Button (visible selection is gone)
3. Select any style or color from dropdown or menu buttons

Result: Selection is lost and cursor is blinking at the beginning of the content ^Apollo 11

This is happening in iframed editor only - inline and divarea work fine.

UPDATES:

• Same happens when you try to insert table (or table inside table) - it gets inserted at the top of document.
• Same happens when you try to remove table with CKEditor context menu option.
• Even worse happens when you try to insert new column - selection is lost and JS error is thrown because of that.
• Same happens when you try to insert place holder. When you try to insert second placeholder in a row you get JS error "Unable to get property 'scrollIntoView' of undefined or null reference".
• When inserting a link i BBCODE I have got: Unable to get property 'collapsed' of undefined or null reference

[Piotrek Koszuliński]

I'm closing this as a DUP of #10612, because it's fixed by initial t/10612b's commit and I want to clean up a little bit.