MAINT-8702 FIXED Uploading any item results in opening previous Item Profile instead of Inventory Floater

MAINT-8700 FIXED The File dialog disconnects the viewer if you do not choose upload files within the first minute

MAINT-8325 Fixed The Save Local dialog disconnects the viewer if you do not choose the save directory files within the first minute

Approved-by: Andrey Kleshchev <andreykproductengine@lindenlab.com>

cmake -E copy does only one file at a time, and older CMake versions don't
handle wildcards. But cmake -E copy is specifically for portability. When the
copy operation itself is Darwin-only, we can count on having 'cp' available.