Follow our own convention when registering a UI component

[Reinmar]

📝 Provide a description of the improvement

We generated this code by default:

		// Add the "fullScreenButton" to feature components.
		editor.ui.componentFactory.add( 'fullScreenButton', locale => {
			const view = new ButtonView( locale );

While our convention is to not suffix the name with the "type" of the component. Which is well visible in the sample that we generate:

		toolbar: [
			'undo',
			'redo',
			'|',
			'fullScreenButton',
			'|',
			'heading',
			'|',
			'bold',
			'italic',
			'link',
			'code',
			'bulletedList',
			'numberedList',

By suggesting an incompatible convention we cause the community plugins to differ from official ones.

BTW, answering "but the suffix make it more clear what we're registering": Yes, it does. But there's also a comment above which we should improve. Ideally, code comments should add something to the code, but right now it reads what the line below says 1:1.

📃 Other details

• Node: …
• Npm / Yarn: …
• First affected version: …

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