Visual Test Shell for BACnet SVN

- Add user preference for EPICS editor (default Notepad.exe)
- Save selected EPICS file even if it has errors, else the EDIT button won't work
- Include ALL EPICS-listed properties in read-object scripts (formerly only those with non-? values)

Refactor BackupRestoreExecutor and InconsistentParsExecutor, moving common code to new parent class SendReceiveExecutor.

Device tree: sort object-type and property-ID controls, simplify numeric type and property entry

Changes to read-all-properties
- Set default DA on EPICS and read-all dialog to "IUT" rather than first-in-name-list
- Add option to use ReadPropertyMultiple for read-all

Add Send dialogs for Who-Is-Network-Number and Network-Number-Is
Convert SendVendorNPDU to a more general Send Raw Network Message, standard or vendor proprietary

Feature Request: 1059124: Add max_segments_accepted to send confirmed requests.

Improve entry of proprietary property IDs: show defined, reserved, and proprietary ranges.
Change captions in backup/restore dialog to clarify usage of timeouts.

Extend "any" keyword:
- save or load from variable ot EPICS
- compare

Make script execution termination terminate ALL steps.
Make script execution terminate without crash when script edit or app is closed.
Rename "halt" to "suspend", and "kill" to "terminate" on menus to reduce ambiguity.
Revise toolbar butoons for suspend/terminate/step

Bug 2979777: used hard-coded class C subnet mask to calculate broadcast address.
Changes:
- bind to a particular address, rather than INADDR_ANY
- calculate the appropriate broadcast address for the bound address
- add adapter select to Port dialog