[PATCH] `completing-read` - allow history=t, sorting improvements

[Daniel Mendler]

I attached patches for minibuffer.el which address these points:

1. Allow history=t to disable the `completing-read` history
2. Sorting improvements

Daniel Mendler

0001-completing-read-If-HIST-is-the-symbol-t-history-is-n.patch
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0002-minibuffer.el-Use-completion-message-instead-of-mini.patch
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0003-completion-all-sorted-completions-Fix-sorting-perfor.patch
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0004-completion-all-sorted-completions-Respect-completion.patch
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0005-completion-all-sorted-completions-Sort-candidates-in.patch
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0006-completion-all-sorted-completions-Sort-alphabeticall.patch
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