#15 Refactor TableDisplay()

[Christopher Nelson]

The _huge_ TableDisplay() function is refactored so
that logical functions are in seperate static functions
(e.g., TableDisplayEmbWindow(),
TableDisplayDrawBorder(), etc.). These functions are
only called once and only from TableDisplay() but by
moving these (often long) blocks of code out, it is
easier to see the flow of TableDisplay() and the blocks
are more loosely (and more explicitly) coupled. No
more goto!

This change adds NO functionality, it should result in
absolutely no differences in behavior. (It will,
however, form the basis for me trying to add smooth
scrolling to tkTable.)

[Christopher Nelson]

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An 1,800-line diff to a 4,000 line file seemed a bit
unwieldy; here's the revised file whole.

[Christopher Nelson]

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Oh, and I added ~100 lines of comments.

[Christopher Nelson]

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Cleaned up diff.

[Christopher Nelson]

Removed some noice from refactored file before diffing.

[Christopher Nelson]

Whole refactored file

[Christopher Nelson]

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This suffers from the same problem that my smooth scrolling
patch does: selection isn't displayed when table is
disabled. I'm working on it....

[Christopher Nelson]

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I fixed the selection tag problem in the smooth scrolling
patch. I'm not planning to port it over here.