Flash features together for logical merge (CR23)

Flash all the features relating to a selected incid at once when the
user selects an incid prior to performing a logical merge.
Enable mixed case GIS layer names (KI107)

Ignore case when comparing column names so that GIS layer names may be
mixed/upper case
Improve speed of 'Select current Incid on Map'

Improve the performance of the 'Select current Incid on Map' button by
using " INCID =" in a SQL statement instead of "INCID IN ()" if there is
only one incid to find as it is much quicker.
General comments and Visual Studio changes

Added various ad-hoc comments to the code and made minor changes to the
Visual Studio solution and InstallShield project.