adjust the anchor message, keyboard recording message, and overwrite
message so they don't take up space when they aren't being shown
(to reduce the minimum width of the window)
Adjust DrRacket so the window can get narrower

For example, a new DrRacket window (with a file named tmp.rkt in the
and 356 afterwards.  This is under mac os x with, I believe, the
default system font sizes. (The file is important because different
languages can have different buttons in the toolbar and the filename's
length itself can affect the minimum size.)

Mostly this change is the addition of a new kind of panel that
lets its children have multiple fixed sizes (as opposed to
just a single minimum size and (optionally  arbitrarily large))
It also adjusts the various toolbar buttons to use this new code.

Also, there's a few tweaks to shrink other things that became the
limiting factor in shrinking the width of the DrRacket window.

Currently, at least for #lang racket programs, the toolbar buttons
along the top of the window are the limiting factor (including the
save button).  With a bogus language (ie, #lang rackeeet), the bottom
bar is the limiting factor, since that will have only the Save, Run,
and Stop buttons.

related to PR 13281
split off common certificate-adding code
load certificates from macosx keychains
Implemented `flmultinomial' (not accurately, but it's there); changed
argument types to match `multinomial'
Documented array printing, broadcasting, and transformations
Documented `math/array' folds

Refactored many of the fold functions (e.g. `array-axis-andmap' is gone,
replaced by short-cutting `array-axis-and', which is sufficient because the
result of `array-map' is non-strict; added `array-count', `array-all-fold';
removed `array-all=' and friends)

Turned common folds into macros (preserves return types better, speeds up
compilation time)

Exposed a safe variant of `unsafe-array-axis-reduce'
Moved flvector functions into math/flonum

Sped up normal distribution sampling procedure (2x for large samples)
Finished array documentation!

Cleaned up other docs in preparation for alpha-testing announcement

Created `math/utils' module for stuff that doesn't go anywhere else (e.g.
FFT scaling convention, max-math-threads parameters)

Reduced the number of macros that expand to applications of `array-map'

Added `flvector-sum', defined `flsum' in terms of it

Reduced the number of pointwise `flvector', `flarray' and `fcarray' operations

Reworked `inline-build-flvector' and `inline-flvector-map' to be faster and
expand to less code in both typed and untyped Racket

Redefined conversions like `list->flvector' in terms of for loops (can do
it now that TR has working `for/flvector:', etc.)
Worked around new typed/rackunit limitations in "array-tests.rkt" and
"mandelbrot-test.rkt"

Fixed error in `array-count' revealed by correctly failing test

Simplified Mandelbrot test
Change define-relation to compile to a judgment-form, instead of a metafunction.

Also:
- remove the restriction on the use of unquote in define-judgment-form
- allows limited use (I modes only) of judgment-forms in terms
- allows the use of define-relation with the search/unification
  based random term generation
Forgot to add the test for commit b4dd3b5e1dcb

Relevant to PR 13209
Changed how array strictness works: `array-strict' now makes the
original array strict instead of returning a new strict array.
(Finally!) The hard part is keeping the Array type covariant. The
solution is to keep the store in the closure of the array's
procedure instead of in the Array struct itself.
setup/getinfo: allow a path string for `get-info/full'
errortrace: remove redundant expansion
fix problem with re-expansion and renamed imports
make the paren highlight use non alpha=1 colors so that
the paren highlight composes with other highlighting in the editor
[honu] ignore braces when computing syntax result for a pattern
[honu] add operator which creates simple lambdas
[honu] return a parsed syntax object immediately if the parser has a current expression