fix several USE_AFTER_FREE coverity bugs CIDs 1491105, 1491164, 1491139, 1491166, 1491168, 1491169, 1491178, 1491232, 1491242, 1492281
Fix CID 1491137 'Out-of-bounds access (OVERRUN)'
fix bug 4668, 'Sometimes, at program start, message list takes all the vertical space' and other sizing issues
revert menu label changes, give translators context instead this avoids breaking custom user shortcuts on these menu items
Rename also “Color label” to “Color labels” As suggested by Paul on translators ML.
Rename grouping menu option “Mark” to “Marks” As requested on translators list. Menu paths also updated to match.
a more nuanced sensitivity is needed
fix bug where, when starting with msgview hidden, toggling msgview to show it would use incorrect height
Remove more unused macros
Honor GTK project name¹, except some files… …where it refers to previous name of the project. ¹ https://mail.gnome.org/archives/gtk-devel-list/2019-February/msg00000.html
remove unneeded gtk_event_box_set_visible_window()
fix View Log button
fix a bunch of buttons in dark corners. add some images to others
fix bug 4513, 'msg window too small in 3 column layout' patch by ???
Add missing config.h includes
Refactor CRLF-truncation into a function
fix Ingreesh
rework tags set correct window title, depending on whether we are configuring the tags, or modifying the tags of the selected message(s); display or don't display the label in the window, depending on the same; improve the English usage; make the 'add' button sensitive, so we don't need the 'tag not set' warning if someone presses Add without setting the tag name; only show the vertidal scrollbar when needed; lots of renaming, e.g. not 'apply_window' but 'tags_window'
remove unnecessary empty menu item in colour label menu; replace empty menu item with separator in tags menu
remove typo semi-colons