Implement copy and pasting

[vsgoulart]

What should we do?

In order to make easier to model forms, we should allow copy&pasting form components

TODO

• The actions should trigger on the default copy and paste shortcuts
• The user should be able to copy only a single component at a time
• When pasting a component, it is added in a new row below the selected component's row (if any)
• If a form doesn't have a selected component, then the copied component is added in a new row at the end of the form.
• The pasted component has all properties inherited from the original component, except the Key and Path attributes where special rules apply:

  • If a form doesn't have a component with the original's component Key / Path attribute (e.g. pasting in a new form), then the component is pasted with the original Key / path attribute.

  • If a form has a component with the original's component Key attribute, then the pasted component's Key is the original's component key + increment by 1.

    • E.g. the original component's Key is name. The pasted component's Key is name2.

  • The suggestion is to not generate a random key but follow the naming convention defined by the user.

  • If the original component has a Path attribute with a nested structure (e.g. group.name), then the pasted component's Path attribute is updated recursively, starting from the root node.

    • E.g. the original component's path is group.name. The pasted component's path is group2.name.
• When a new component is added (pasted) to a form, automatically select it and expand the General section in the properties panel.
• We should run a validation on paste to check if the schema is valid, in the future we might want to show a toast notification to let users know that the schema pasted is not valid

Test cases:

• Copy paste component from same form
• Copy paste component in different form
• Pasted components in Modeler and Tasklist