Replace all ToolBar Icons with SvgNodes

[Maran23]

Smaller scope as in: #16944

Replace all Ikonli icons with SvgNode material design icons.

Use them from here: https://github.com/Maran23/svg-materialdesign (dependency)

[7amo10]

/assign-me

[jabref-machine]

⚠️ Issue Already Assigned

Hi @7amo10, this issue is currently assigned to @Maran23.

Note

If no progress is made within 8 days, the issue will be automatically unassigned.

Options for contributors

• Wait for availability: The issue may become available if auto-unassigned
• Collaborate: You can ask the assignee if they want help
• Maintainer assistance: A maintainer can add you as co-assignee if appropriate