[regression] Editor: weird scrolling on focus

[Douglas Hays]

Run test_Editor.html in IE6 (I'm testing on [14587]).
Scroll down to the 3rd editor widget (Optional toolbar buttons), making sure the entire widget is in view, and click to focus the 1st line of content text.
Scroll all the way back to the top, and click on the 1st line of text in the 1st editor (Created from div).
The cursor goes to the end of the 2nd line instead of the 1st line where it was clicked and the editor's 2nd line scrolls to the top of the screen.
Setting the milestone to 1.2 since this is a regression from 1.1.1.

[Douglas Hays]

The above failing scenario should have said to use the the mouse wheel to scroll and not the scrollbar. Clicking the scrollbar also causes weird, but different scrolling problems that were also not in 1.1.1. But it's probably all related.

[Douglas Hays]

Seems to start misbehaving with [13415].

[Douglas Hays]

I could not recreate this since the refactor was backed out - tested on [16546]

[Douglas Hays]

Oops, just recreated it.

[Douglas Hays]

moveToBookmark is being called before the input caret appears which upsets IE

[Douglas Hays]

(In [16555]) Fixes #7274, #8476. On mousedown in IE, remove previous saved cursor position, and additionally set the cursor to the end if the event was to empty space.