Fix topbar types

[NiklasRamstrom]

Describe your changes

After the alignment of react version, the exported types in topbar was broken.
This fixes the types.
Also, a prebuild step is added for topbar as it requires icons to be build.

Checklist before requesting a review

• I have performed a self-review of my own code
• I have verified that the code builds perfectly fine on my local system
• I have added tests that prove my fix is effective or that my feature works
• I have commented my code, particularly in hard-to-understand areas
• I have verified that my code follows the style already available in the repository
• I have made corresponding changes to the documentation

[axis-d0op]

lgtm