Assign a global keyboard shortcut T to open the tagging dialog.

• The keyboard shortcut should be available when one or more taggable items are selected.
• The keyboard shortcut should be available in global mode when the user has selected one or more taggable items.
• The keyboard shortcut should not be available in edit mode. Editing a content is typically done in a form. The Tags field should be placed directly on the form rather than launched in a separate dialog.