So that the type definitions reflects the docstrings more closely. In additon,
fixed warnings from flymake about docstring.
* mu4e/mu4e-draft.el
mu4e-compose-keep-self-cc: should be a comma
* mu4e/mu4e-folders.el
mu4e-maildir-shortcuts: recognize new (plist) format
* mu4e/mu4e-helpers.el
mu4e-debug: removed unnecessary double space in docstring
* mu4e/mu4e-query-items.el
mu4e-query-rewrite-function: prepend "\\=" before column 0 "(" in docstring
* mu4e/mu4e-search.el
mu4e-search-sort-field mu4e-search-sort-direction: used radio in types
* mu4e/mu4e-server.el
mu4e-mu-binary: "mu" executable must exist
* mu4e/mu4e-view.el
mu4e-view-fields: fixed type
mu4e-view-actions: for function refs, prefer "#'" rather than "'"
Implement function / datas structure to conveniently aggregate all
query-related data, for reuse in various places in mu4e...
... to start with the main menu, which gets much simpler. And the
modeline.