Version string is listed under Mac App Store Options, however, Application.version returns this same string on other platforms as well.

Steps to reproduce:
1) Create a new project.
2) Go to Edit > Project Settings > Player > Other Settings.

Under 'Mac App Store Options' category, notice there is a 'Version' entry. However, when this entry is changed, Application.version returns this string on other platforms as well (Windows and Linux, also when used for Unity Performance Reporting, for example). Additionally, the name of this entry should probably be changed to 'Application Version', to better reflect what it represents.

Reproduced on:
2017.1.0a6, 5.6.0f3, 5.6.0b6 (this field first appeared in 5.6.0b6)