Use new master function for all color selection actions

At present, the new master function is just a thin wrapper to the
terrible default Windows color dialog.

In the future, it will be replaced by a custom PhotoDemon color
selection dialog.  By wrapping it now, I won't have to do any extra work
upon building the new color selector - I can just drop it into place.
This will also make it simple to provide a preference, if desired, for
using the stock Windows color selector.  (Photoshop has such a
preference, which is why I'd consider it.)
Add parameter to aspect ratio calculator for inclusive/exclusive calculations

By default, inclusive is preferred (e.g. fit the entire image to the new
aspect ratio), but in circumstances like the new resize tool, exclusive
is also a valid consideration.
Improve comments
Vastly improved resize dialog (Smart Resize integration)

This commit takes the changes previously destined for a separate Smart
Resize tool and instead integrates them into the main Resize tool.  By
default, the "smart" options are hidden if "preserve aspect ratio" is
checked.

If aspect ratio is not being preserved, the new options come into play.
Basically they provide the user with alternatives to traditional
"stretch to fit" behavior, which distorts images and generally makes
them ugly.

Fit Inclusive fits the image within the new dimensions with aspect ratio
preserved.  It then fills any empty borders with a color of the user's
choosing (or transparency, if the image is 32bpp).

Fit Exclusive resizes the image so that its smallest dimension fits
without distortion inside the new dimensions.  Any overhanging image
edges are cropped.

I frequently use both these options when converting photos to wallpaper
size.  My cameras do not have the same widescreen aspect ratio as my
monitor, so it is difficult to resize them to wallpaper size without
distortion.  These new fill options make it much easier.

In the next week or two, I will be integrating these options into a
dedicated "batch resize" option within the batch wizard.