Changes

0033542: Visualization, AIS_ViewController - New AIS_DragAction for when drag interaction is confirmed

Added AIS_DragAction_Confirmed drag action, which will be called by AIS_ViewController when the drag interaction is confirmed (mouse moved more than click threshold).

0033552: Foundation Classes - NCollection_BaseMap move ctor clears wrong pointer

Replaced correct class member to clear

0033553: Foundation Classes - HashUtils compilation problem

Updated OptimalSeed template

0033554: Foundation Classes - Missed hash specialization for enumerations

Fixed problem with missed hash specialization

0033555: Foundation Classes - DEBUG macro leads to compile error

Removed incorrect parameter call when DEBUG macro is active

0033557: Coding - Cocoa compilation problem

Fixed extern relation for VisTest component on MacOS

Update version to 7.8.1 dev

0032487: Visualization - synchronize myHasEntityWithPersistence with such entities number

Changed myHasEntityWithPersistence to a counter.
Renamed variable to myNbEntityWithPersistence.
Modified HasEntityWithPersistence() method.
Modified logical test in SelectMgr_ViewerSelector::traverseObject.

0033551: Visualization - Add new transform persistence mode to force orthographic projection on object.

The new transform persistence mode, with flag `Graphic3d_TMF_OrthoPers`, can be combined (bitwise OR operation) with the other persistence modes (2D, Trihedron or Zoom/Rotate Persistence) to make objects be rendered with orthographic projection when it is on a view with perspective projection.

If the view already uses orthographic projection, there will be no difference.

This feature was implemented to fix ViewCube being distorted when view with perspective projection changes size.

0033567: Modeling Data - GeomLib_IsPlanarSurface raises exception SIGFPE Arithmetic Exception in Release mode

Add protection against zero-division

0033564: Data Exchange, STEP - Making default unit parameter

Updated signature for step makers with units
  to have default unit as a mm (no scaling)

Revert "0033551: Visualization - Add new transform persistence mode to force orthographic projection on object."

This reverts commit 0141024df595cdc8db3004927ca48c249776603b.