[book] initial prop dialog
[book] continue prop dialog
[book] prop dialog except save
[book] prop dialog complete
[book] prop dialog complete
[book] integrate design menu, toolbar
[book] run multi-line command
[book] update spacefm.pot
[book] prop dlg limit built-in items
[book] prop dlg save on open in editor; move opts
[book] prop dlg layout; check terminal uncheck task
[book] prop dlg icon sens; popup task compliance
[book] prop dlg open on missing target
[book] prop dlg plugin icons; activate entries
update manual/homepage locations (github.io)
[book] prop dlg sep submenu sens
[book] prop dlg manual updated; misc adjustments