Add search fields for the following pages: Mosaics, Namespaces, Nodes, Accounts, Transactions, Blocks Related issues: [Search Nodes](https://github.com/symbol/explorer/issues/876), [Search for a namespace](https://github.com/symbol/explorer/issues/735)
Add search fields for the following pages:
Mosaics, Namespaces, Nodes, Accounts, Transactions, Blocks
Related issues: Search Nodes, Search for a namespace