Controls the time after which tooltips will appear when browse mode is enabled, in milliseconds.
Browse mode is enabled when the mouse pointer moves off an object
where a tooltip was currently being displayed. If the mouse pointer
hits another object before the browse mode timeout expires (see
GtkSettings:gtk-tooltip-browse-mode-timeout), it will take the
amount of milliseconds specified by this setting to popup the tooltip
for the new object.
This setting is ignored.