Change foreground color to `blue' like lines representing threads
with flagged messages in notmuch-search. Before tag `flagged' was
shown in notmuch-show buffers as image star on graphical frames while
there was no visible distinction to other flags on terminal frames.
(defcustom notmuch-tag-formats
'(("unread" (propertize tag 'face '(:foreground "red")))
- ("flagged" (notmuch-tag-format-image-data tag (notmuch-tag-star-icon))))
+ ("flagged" (propertize tag 'face '(:foreground "blue"))
+ (notmuch-tag-format-image-data tag (notmuch-tag-star-icon))))
"Custom formats for individual tags.
This gives a list that maps from tag names to lists of formatting