The creation of the styles directory was in two places and the importing
of an old customized style didn't have any safety when the name
'customized.xml' already existed.

Patch based on the analysis by Grigory Zagorodnev.

Task-number: 253974

Not all colors inherit the color from the standard text. For example
line number colors.

So people's customized color schemes don't get lost, but get converted
to the new format instead.

We now at least follow what other Mac applications do.

For this we needed to get rid of using QToolBar.

Makes sure that all files recognized by the CppEditorFactory get the
proper icon.

this gives a rather amazing performance boost to the pro reader

it was superseeded by using non-cumulative, corrected evalution for
determining the targets.

Add some functionality needed for CVS.

Also synchronized suffixes to match what is in the xml file.

This was because they are not stored and thus loaded as invalid colors,
which is fine, but on saving the invalid colors would then turn into
black.

Reviewed-by: Roberto Raggi

This always selected the whole filter text when entering a directory.

Details:
Added one new purple icon for .c files and registered
the same icon for .hpp extensions.

Specially for FakeVim users out there who want an easy way to switch to
vim's default color theme on a dark brackground.

Also did a little cleanup.

Since that method actually checks if Qt is built 64bit,
not if MSVC is 64bit.

Create a new one and check if it's the same as the old one,
has the advantage that cached data doesn't need to be retrieved again.
It was that way before tool chain was moved to Qt4Project.

Reviewed by Thorbjørn Lindeijer

Made the function a private member instead.

Reviewed-by: ossi

 - show side-by-side if possible
 - always show side-by-side
 - always show full help

The default is "show side-by-side if possible". It's currently considered
possible if the editor is at least 800 pixels wide.