Add "About Sigil" menu item

[GoogleCodeExporter]

I tried to find the Sigil version number from within Sigil and could not.

Conventionally on OS X, applications will have an 'About' menu item under the 
application main menu.

What I'd like to see is a menu item called 'About Sigil' under the 'Sigil' menu 
item. When I click on 'About Sigil' a dialog should popup that presents the 
application version number and perhaps other information (typically the 
copyright notice).

I'm using Sigil 0.3.4 on OS X 10.6.7.

Original issue reported on code.google.com by d8v3h...@gmail.com on 2 Apr 2011 at 1:58

[GoogleCodeExporter]

Help->About

Original comment by Strahinja.Markovic@gmail.com on 2 Apr 2011 at 2:26

• Changed state: Invalid

[GoogleCodeExporter]

There is no Help > About on 0.3.4 in OS X. Please reopen this issue.

Original comment by d8v3h...@gmail.com on 2 Apr 2011 at 2:49

[GoogleCodeExporter]

Then check in the main "Sigil" menu.

Original comment by Strahinja.Markovic@gmail.com on 2 Apr 2011 at 2:52

[GoogleCodeExporter]

OK, it is there ... I got 'blinded', perhaps, by the blue question mark icon in 
front of the text in the menu item. I am so used to looking for the leading 
word "About" that my brain registered the icon and didn't look any further.

A bit unusual to see an icon there; but that kind of thing is fallout from 
multi-plaform development I guess.

Sorry for the false report.

Original comment by d8v3h...@gmail.com on 2 Apr 2011 at 2:59