Move from Tabs to Expansions Panels

[daniel-soli]

Closes #202

Features:

• Changed from Tabs to Expansion Panels in AccountsDetail and NFTDetails pages
• Small update to NFTGrid pagination so it better fits the panels

[modersohn]

You needed to change the NFT grid component so that the pager was centred again.

Well, for all other tables, where we were using MudTable with ToolbarContent, these are no longer centred:

Will have a look.

[modersohn]

OK I think I've got everything now - please have a look when time permits @danielsolistensvik and then I'll merge.

[daniel-soli]

@modersohn : I've taken a look, and tested it and I think it looks nice with those enhancement you did! Really nice

I say go for it :)