[IE] Paragraph before table is not deleteable

[Garry Yao]

Reproducing Procedures

1. Open the replace by class example page with IE6.
2. Click on 'New Page' to clear up document;
3. Insert a default table, then click the spaces before the table;
   • Exptected Result: You get a empty paragrahp created.
4. Click on the created paragraph, press 'Backspace';
   • Exptected Result : The paragraph is deleted.
   • Actual Result : It's unable to delete the paragraph;

[Garry Yao]

Now table insertion in empty paragraph always replace it so the severity of this problem is much lower.

[brooks]

confirmed in firefox3.5,IE8

[Garry Yao]

The problem here in Firefox and IE should be distinguished:

1. IE: A browser bug at first place, the first paragraph can't be removed by backspace or del.
2. FF: After the paragraph is removed by the keystrokes, we fix the range with a block so it's looks as if it's never been removed.

The problem is that our fix body logic has no awareness of the reason how such a range (collapsed under body) is formed, as it's not a fault in some cases:

1. When the cursor is moved there with navigation keys (e.g. Arrow keys) the current behavior is reasonable.
2. When is rather left there because of modification keys (e.g. Del, Backspace), the cursor should be moved into surrounding blocks instead.

[Garry Yao]

In any case, the fixing of this bug requires additional keystrokes handling, is what we're trying to avoid in this milestone, as those keystrokes are quite often used and may easily lead to regressions, we could handle this along with other keystroke management required bugs in next milestone.

[Jakub Ś]

DUP of #6217