Task Manager; Client Workflow fixes

The following fixes relating to Client Workflows in the Task Manager have been made:

• Clicking the 'Send Document' button will now prevent sending a Document if Workflows with different target types are selected, e.g., if selected Workflows are a mix of Client and Account Workflows.
• When sending an Email or SMS to a selection of Workflows with different target types, only applicable tags are shown, e.g., if a mix of Cient and Account Workflows are selected then no Account tags will be listed since these are not applicable to Clients.
• The 'Incoming Communication' button is now disabled when more than one Workflow is selected; previously, clicking this button would display a message that it was only valid for a single Workflow.