[GRASS-git] [OSGeo/grass] 12f688: Update tree.py

[Michael Barton]

  Branch: refs/heads/cmbarton-patch-1
  Home:   https://github.com/OSGeo/grass
  Commit: 12f6881e8c2482f0a9137b1baf692114aeaf7de7
      https://github.com/OSGeo/grass/commit/12f6881e8c2482f0a9137b1baf692114aeaf7de7
  Author: Michael Barton <cmbarton at users.noreply.github.com>
  Date:   2020-09-07 (Mon, 07 Sep 2020)

  Changed paths:
    M gui/wxpython/datacatalog/tree.py

  Log Message:
  -----------
  Update tree.py

This adds an error trap in the data catalog initialization for unacceptable map names and info to user about which map names are a problem #959