Items can be pinned to directories that require administative privileges
(such as Open-Shell's default installation directory), so long as users
take ownership of the pinned folder. Also adds a command to Open-Shell's
context menu that opens the current pinned folder.
Adds general support for directory-based settings by creating a new
setting type called TYPE_DIRECTORY which uses a new bool added to
BrowseLinkHelper, called bFoldersOnly. START_MENU_PINNED_ROOT
has been removed, and all instances of both it and BrowseLinkHelper
have been adjusted accordingly. To create your own directory-based
settings, use CSetting::TYPE_DIRECTORY. Empty directory paths are
reset to their default value as they can cause unexpected behavior.
Some icons (modern settings, jump-list tasks) are monochrome, basically
they are defined just by alpha channel.
Thus they can be displayed in any color (white is default).
Since these icons are white by default, they look nice on dark
backgrounds. But they are not very visible on light backgrounds.
Thus the idea is to 'colorize' such icon using color of corresponding
text item. That way they will always have proper color.
Fixes#466.
Task jump-list items for modern apps require special handling.
First of all they don't provide icon directly.
Icon location is stored in `PKEY_AppUserModel_DestListLogoUri` property.
And then has to be resolved for given application package.
Next, context menu of provided `IShellLink` item doesn't seem to be able
to start actual link target.
Thus we need to obtain context menu of target item.
Fixes#375.
