More options in Project Explorer.

[bhrnjica]

Project explorer is showing loaded projects and ML configurations in tree structure. User should have possibility to righ click on any tree item and context menu with options should be shown.
Currently the flowing options are supported on mlconfig tree item:

• Rename,
• Delete.

More options should be added:

• duplicate- this menu option should duplicate selected mlconfig create a new one with the same configuration. Once it is duplicated it should be added to the annproject. This option is useful when the user want to make a copy mlconfig in order to change something minor.
• Rename, - for project tree item.
  -more options