[DEFECT] Specialized plots (e.g. OptPath, PopulationPlot, etc.) ignore "dir" attribute in the input file

[alfoa]

Thank you for the defect report

• I am using the latest version of RAVEN.
• I have read the Wiki.
• I have created a minimum, reproducible example
  that demonstrates the defect.

Defect Description

Specialized plots (e.g. OptPath, PopulationPlot, etc.) ignore "dir" attribute in the input file

Steps to Reproduce

add a "dir" attribute in any of the specialized plots

Expected Behavior

"dir" directory to be considered and plot to be save in subdirectories when indicated

Screenshots and Input Files

No response

OS

Linux

OS Version

No response

Dependency Manager

PIP

For Change Control Board: Issue Review

• Is it tagged with a type: defect or task?
• Is it tagged with a priority: critical, normal or minor?
• If it will impact requirements or requirements tests, is it tagged with requirements?
• If it is a defect, can it cause wrong results for users? If so an email needs to be sent to the users.
• Is a rationale provided? (Such as explaining why the improvement is needed or why current code is wrong.)

For Change Control Board: Issue Closure

• If the issue is a defect, is the defect fixed?
• If the issue is a defect, is the defect tested for in the regression test system? (If not explain why not.)
• If the issue can impact users, has an email to the users group been written (the email should specify if the defect impacts stable or master)?
• If the issue is a defect, does it impact the latest release branch? If yes, is there any issue tagged with release (create if needed)?
• If the issue is being closed without a pull request, has an explanation of why it is being closed been provided?

[wangcj05]

Issue closure checklist is good.