broken out from compile-internal.
Don't change window height if it is the frame root window.
(compile-internal): Call it.
(compilation-goto-locus): Call it.
Use any visible frame already showing the compilation buffer.
(completion-list-mode): Make it local.
(choose-completion): Pass its value to choose-completion-string.
(choose-completion-string): New arg base-size.
Use that when deciding how much to delete.
exploits modified built-in versions of `fset' and `defalias' which
take care of this functionality directly:
(ad-start-advice-on-load, ad-activate-on-definition)
(ad-definition-hooks, ad-enable-definition-hooks, ad-defined-function)
(ad-advised-definers, ad-advised-byte-compilers, byte-constant)
(byte-constant-limit, byte-constant2, byte-fset)
(ad-byte-code-fset-regexp): Variables deleted.
(ad-activate-defined-function, ad-find-fset-in-byte-code)
(ad-scan-byte-code-for-fsets, ad-advised-byte-code)
(ad-recover-byte-code, ad-enable-definition-hooks)
(ad-disable-definition-hooks): Functions deleted.
(defun, defmacro, fset, defalias, define-function)
(byte-compile-from-buffer, byte-compile-top-level): Removed `defadvice'
for these functions.
(ad-save-real-definitions): Removed saving of `byte-code'.
(ad-activate-off): New dummy function.
(ad-activate-on): New name for `ad-activate'. All calls changed.
(ad-with-auto-activation-disabled): New macro prevents automatic
advice activation.
(ad-safe-fset): New function, used instead of `ad-real-fset'.
(ad-compile-function): Disable automatic advice activation while
compiling, because `byte-compile' uses `fset'.
(ad-activate-on): Renamed from `ad-activate'. Avoid recursive calls.
(ad-activate-on-top-level): New variable.
(ad-start-advice, ad-stop-advice, ad-recover-normality): Modified to
achieve de/activation of automatic advice activation by setting the
definition of `ad-activate' to `ad-activate-on' or `ad-activate-off'.
(ad-start-advice): Is now called unconditionally when Advice is loaded.
Made compilation behavior of advised definitions customizable, since
loading the byte-compiler takes some time and is not always worth the
cost, e.g., if one only wants to make a few simple modifications:
(ad-default-compilation-action): New variable which specifies whether
to compile an advised definition in case the COMPILE argument to
`ad-activate-on' or one of its friends was supplied as nil.
(ad-preactivate-advice): Supply negative COMPILE argument to prevent
compilation.
(ad-should-compile): New function.
(ad-activate-advised-definition): Use `ad-should-compile' to determine
whether an advised definition should get compiled.
(ad-activate-on, ad-update, ad-activate-regexp, ad-update-regexp)
(ad-activate-all): Doc fixes.
(ad-update): Leave handling of COMPILE up to `ad-activate-on'.
Extracted construction of freeze-advices from `defadvice':
(ad-make-freeze-definition): New function.
(defadvice): Use `ad-make-freeze-definition' to construct frozen defs.
(imenu--cleanup): New function.
(imenu-example--name-and-position): Now uses markers.
(imenu-add-to-menubar): New function to add an entry
to the menubar for the buffer's current local keymap.
