Keep representation control at top

[liamhuber]

Layouts are not perfect, but at least the control toggles float at the top now.

Closes #134

[github-actions[bot]]

:point_left: Launch a binder notebook on branch _pyiron/ironflow/keep_representation_control_attop

[coveralls]

Pull Request Test Coverage Report for Build 3569572924

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 63.907%

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Totals
Change from base Build 3569564037:	0.0%
Covered Lines:	2192
Relevant Lines:	3430

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💛 - Coveralls