[WC-3037] RichText: Modal form orientation

[yordan-st]

Pull request type

New feature (non-breaking change which adds functionality)

---

Description

Added support to configure the form orientation of modals, via the widget properties in Studio Pro.

Now Developers can configure this in the same way as this is done with regular TextBoxes in a DataView

What should be covered while testing?

• Toggle 'vertical' or 'horizontal' orientation in the General tab, Editability section
• Run app and check if this changed the orientation for add Link, Image and Video modals
• Inspect if this correctly changed the classes to 'vertical' or 'horizontal'
• Inspect if the 'for' and 'id' attributes of the labels and inputs correspond to eachother
• Inspect if the DOM structure changes. Similar to regular TextBoxes in DataViews, the DOM should be different when toggling between orientations.