library: Add location entry

[SoNiC-HeRE]

Closes #350

Implemented the following changes:

• Made the UI interactive by using Revealer
• Used Gtk.SpinButton and Gtk.Dropdown for changing values
• Covered all 8 properties

Looking for an early review

[sonnyp]

Looks good!

Could you make the stop button sensitive: false when the session is started and vice versa? Like ASHPD.

Something I noticed is that pressing "Run" after starting a session breaks the demo, could you look into that?

[sonnyp]

only 2 spaces indent please, example:

Suggested change

	adjustment: Adjustment {
	lower: 0;
	upper: 100;
	step-increment: 1;
	value: 0;
	};
	adjustment: Adjustment {
	lower: 0;
	..
	};

[sonnyp]

please use a Adw ComboRow instead of an ActionRow + DropDown

[SoNiC-HeRE]

Looks good!

Could you make the stop button sensitive: false when the session is started and vice versa? Like ASHPD.

Something I noticed is that pressing "Run" after starting a session breaks the demo, could you look into that?

I've applied all the mentioned changes and it seems to work fine and does'nt break even when a session has started and i press run button again; maybe can you try again and lemme know if that happens again?

[sonnyp]

It happens when the session isn't closed before pressing "Run" again.

I'm not sure what we can do about it at the moment. Possibly we have to wait until we support opening JS demo in a separate process.

I'll investigate.

[sonnyp]

Let's merge this, I have filed an issue about the problem which we can tackle later

https://github.com/sonnyp/Workbench/issues/388