Customize tree grid columns

[VolodymyrSh]

Description

What changes are included in this pull request?
Customize tree grid columns

Reason

• Bug fix
• Feature enhancement
• New feature
• Documentation update
• Upgrade
• Other

Are you responding to a filed Issue? (bug report, feature request, documentation request, etc)

#1

Testing

Aras Innovator

• Major version: 12.0
• Service pack(s): SP0

Browsers

• Internet Explorer 11
• Firefox ESR
• Chrome
• Edge

Does this pull request include known issues?

Customize tree grid columns appearance possible? #1

Checklist

• Did you confirm the Install Steps in the README are still correct?
• If this PR adds or changes functionality, did you update the Usage Steps in the README?
• Did you add your GitHub user name to the "Credits" section in the README?