IDE-271 Typographic hierarchy should be visible

[Frajhamster]

Jira ticket: https://catrobat.atlassian.net/browse/IDE-271

Description:

• Improved backpack menus UI

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[JayTropper]

Please update the header to Copyright (C) 2010-2024 The Catrobat Team in every file where the year is not 2024 and remove the merge commit you did. If you need help with GIT you can just text me.

[JayTropper]

It would be nice to get rid of the warning Raw use of parameterized class 'Pair' by using Lists as bellow:

Suggested change

	Pair[] items = new Pair[] {
	new Pair<String, Integer>(getString(R.string.unpack), R.drawable.ic_logout),
	new Pair<String, Integer>(getString(R.string.delete), R.drawable.ic_delete)};
	List<Pair<String, Integer>> items = Arrays.asList(
	new Pair<>(getString(R.string.unpack), R.drawable.ic_logout),
	new Pair<>(getString(R.string.delete), R.drawable.ic_delete)
	);

[JayTropper]

Here the same as in BackpackRecyclerViewFragment.java.

[JayTropper]

Here the same as in the other files.