* mh-identity.el (mh-assoc-ignore-case): New macro that uses
assoc-string (if the function is available) and falls back on assoc-ignore-case if assoc-string is not found. (mh-identity-field-handler): Use mh-assoc-ignore-case since assoc-ignore-case is a obsolete function in Emacs 22. * mh-e.el (mh-folder-buttons-init-flag): New variable that keeps track of whether the tool-bar in mh-folder-mode has been initialized yet. (mh-folder-mode): Initialize the tool-bar for folders the first time we get into mh-letter-mode. * mh-customize.el (mh-buffer-exists-p): New function which tests presence of buffers of a given mode. (mh-tool-bar-define): New functions mh-tool-bar-folder-buttons-init and mh-tool-bar-letter-buttons-init are defined. These functions are used to create the tool-bar from the corresponding customizable variables. * mh-comp.el (mh-letter-buttons-init-flag): New variable that keeps track of whether the tool-bar in mh-letter-mode has been initialized yet. (mh-letter-mode): Initialize the tool-bar for drafts the first time we get into mh-letter-mode.
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