[IE] Text selection to end of caption causes JS error

[Marek Lewandowski]

since: 4.0 until master
issue not found in 3.6.6.1 though

1. open any sample with CKEditor (i.e. samples/replacebyclass.html)
2. using "Templates" button from toolbar, insert template "Text and table" (replacing current content)
3. click "Table title" in order to edit it
4. press Home key
5. press Shift+End key

Expected result:
Table caption text should be selected.

Current result:
Caret does not move, no text is selected. Javascript exception is thrown.

js error:
SCRIPT16389: Unspecified error.
selection.js, line 800 character 5

additional info:
if caption has multiple lines, issue occurs only in last line.

[Piotrek Koszuliński]

Checked on IE9, IE10 - on both this issue is reproducible.

[Jakub Ś]

Error SCRIPT16389 is also mentioned in #10857, #10858, #10894, #10970.