WebBrowser support in C1SpellChecker

Starting with version 2.0.20092.50, the C1SpellChecker component supports spell-checking of editors that derive from the standard WebBrower control.

The support includes underlining errors with red-wavy underlines as you type, with suggestions in context-sensitive menus, and also the traditional dialog-based modal spell-check.

The methods used are the same as the ones used with TextBoxBase controls:

- SetActiveSpellChecking turns as-you-type spell checking on or off, and
- CheckControl performs a dialog-based modal check of the text in the control.

The C1SpellChecker also supports the new ComponentOne XhtmlEditor control, which is based on the WebBrowser control.

This pargraph contians a few speling mistaked made on purpose only to showl that the spell-checker wors corretly.