Add/remove installation path to/from Windows PATH environment variable when...

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Description

Add/remove installation path to/from Windows PATH environment variable when installing/uninstalling through Windows installer

Based on Bill Stewart's "PathMgr" 2.0.0 library & Inno Setup example script at https://github.com/Bill-Stewart/PathMgr/blob/v2.0.0/PathMan.iss.

This library (licensed under LGPL v3.0) is mentioned among the (not officially endorsed or supported) "Inno Setup Third-Party Files" at https://jrsoftware.org/is3rdparty.php.

• Add PathMgr.dll 2.0.0 to scripts folder
• Add task & necessary glue code for managing path environment variable
• Move PathMgr.dll during windows_installer build to root folder
• Ignore temporary Inno Setup scripts & DLLs in root folder

Related Issues

Resolves #1145

How has this been tested?

I manually tested the follwoing sucessfully on my (German) Windows 10 Professional:

• Installing with setting path
• Installing without setting path
• Uninstalling with path set
• Uninstalling without path set

Screenshots (if appropriate):

German Inno Setup "additional tasks" UI:

As visible in the screenshot plus marked in the code as TODO, the task description has not been translated yet.

Types of changes

• New feature (non-breaking change which adds functionality)