DEN-7147: Fixed a bug on Sub-StepIndicator on bottom of the instructions
- Which was causing that to not to show correct number of the steps and titles.
- removed #include "MModel.h" in all the possible cases and include the specific model since the MModel has too much include.
- Showing the Heparin setup in the CART_INSTALL state only if we have a heparin volume setup.
- created a common template function name enumString in Gui namespace to get the enum name as string.