Fix MyWallets screen crash on fresh app cause wallets folder doesn't exist; Fix match accented words

FIX: Correct usage of wallet names; Refresh wallet list button; Deny specials caracteres for wallets names; Add screen wallet options; Can delete wallet; Refusee wallet name.

Add error handling information when no endpoint is configure. Build GVA history query only if pubkey is not empty;

Reviewed-on: https://git.p2p.legal/axiom-team/gecko/pulls/4