Add popup to edit dialogs to display available macros

From http://www.openvpms.org/project/macro-list-popup-hot-key

Currently the only way to view available macros is via the Administration -> Lookups workspace.
Macros should be able to be viewed while performing editing where macros are supported.
Currently, this applies to:

• EditDialog (all IMObject editing)

• ParameterDialog (report parameters)

This change would have a macro dialog pop up when a specific key combination is pressed.

This dialog would:

1. display a table of macros
   The table would display the code and name nodes of the macros
   By default, it would be sorted on name

2. display a large number of macros without requiring scrolling
   Page navigation buttons will be automatically displayed if there are too many macros to fit

3. provide a filter to query macros by partial name and/or code
   By default all macros will be displayed

4. be closed by pressing an OK button, or the ESC key