Ability to hide the right panel with component properties

[kamil-kwarciak]

Requested by @krystian-panek-wttech in #179

It could be nice to work with it on wide screens but on my Mac display, I prefer old-style dialogs only, because now I see the editing options duplicated. I have no clue how to collapse right panel in the same way as I could collapse the left panel using the arrow icon. Probably the same icon to be added for the right panel.