The CRC hack option is always used regardless of whether the HW Hack
checkbox is ticked. Move it to the main gsdx dialog and make it use the
same descriptions that are used in Linux.

And fix the accurate_blend_unit whitespace formatting.

Tooltips will be usable for all Gsdx dialogs if required.

This moves the hardware, non-renderer dependent options to the top and
makes the renderer options visible only when it affects the current
renderer.

The texture filtering checkbox has been changed to a combobox and now
uses the same description as Linux does.

Also changes the Title to GSdx Settings.

Changes the three-state checkboxes to comboboxes.
Removes the hack description box.
Hides Alpha and Alpha Stencil when OpenGL is selected.
Rearranges the hacks dialog.

The changes to the Hacks dialog removes the need for these defines.

Also remove the swap_state function since it's now unused.

The hack description box messages were replaced by tooltips on Windows,
so there is no need for the first line in the description to refer to
the hack anymore.

3-state checkboxes were also converted to comboboxes, so remove any
references to checkbox states.

Reformat the descriptions so it looks okay on both Windows and Linux.
Could be better, but I'm out of ideas.

Also fix a few typos and missing punctuation.

For Linux and Windows, add tooltip descriptions for AF, AA1, extra
rendering threads, Enable Shade Boost, FX Shader/External Shader, FXAA.

For Windows, also add Alpha Correction and Logarithmic Z tooltips.

For Linux, add software mipmap tooltip.

Thanks to tsunami2311, ssakash, gregory38 and whoever did the wiki for
helping with descriptions.