... which is not yet used for anything.
It could be used to describe textual paths for attaching plug-in menu items.
Strings are only path local, not necessarily globally unique, and may be
left empty for separators and for groups that should be transparent to
path identification.
It may also be empty for certain sub-menus, such as those that group effects
according to the changeable criteria in Preferences.
... There are now four immediate subclasses (SharedItem and Computed Item,
which are final, and SingleItem and GroupItem, which are abstract), which may
serve future purposes more general than menu items. There are further
subclasses specific to menu management.
The former concrete class GroupItem is renamed TransparentGroupItem.
Also allows direct construction of items in lists from shared pointers.
... in Wave track context menu and SetTrackVisualsCommand
Instead, discover them through a registry.
This eliminates some duplication of string constants and prepares for
non-intrusive generalization to more kinds of sub-views.
This makes the command agnostic about which subview types are known, but the
context menu still has special case treatment for Spectrogram Settings and
Wave Colors.
... Don't do it at the low level of construction of a command object. Do it
only at the highest possible level, where an external scripting module or
Nyquist calls into the command framework. Pass the project pointer down where
it is needed.
... in cases of "TranslatableString" that are not really translated.
This makes it easier to scan the code for such unusual constructions of
TranslatableString, distinct from mere mentions of the TranslatableString type.
... Because label wasn't used when reading back, and it was, questionably,
writing localized strings out.
CommandManager serialization is used only for exporting and importing keystroke
shortcuts, and not in save and load of projects.
There was apparently confusion too about tab characters separating command name
from a menu accelerator, but such are not stored in the label field of
CommandListEntry. Those tabs were only added by certain accessor functions,
which are here renamed.
... and deduce whether to exclude from macros inside NewIdentifier, simplifying
argument lists further
Also fix the localization of "..." added to names by PluginMenus.cpp
