Patch Set 2:

I changed the following in patch set 2:

- There is now a "Hard-wrap commit message" option in the preferences. (Maybe there are more options which belong into this preference page, or else we can move this setting to the general git preference page.)

- In the commit dialog there's a link which opens the preference page to change the option. The preference page opens "above" the commit dialog and nothing is lost when one returns from the preference page (this is the same as "Configure Commit Templates" in the CVS commit dialog).

- The commit message editor font is now configurable and defaults to the "text font", which is usually monospace. (General -> Appearance -> Colors and Fonts)