Create Block page

The next page to recreate is the Block page. In the current state:

There are:

1. Block number at the top.
2. Prev/next block buttons.
3. Counters and date.
4. Filters button.
5. Transactions list.
6. Virtual operations list.

I believe we should change it that way:

1. Header card with block number, arrows for prev block and next block, date of block and operations counters.
2. Filter section, with button opening modal and display of what current filters are.
3. List of operations.
4. List of virtual operations.

The data will be fetched in Block page completely. We must get the block and transactions data from proper endpoint. It will be written to component's state and passed later by props. As I see getOpsByBlock and getBlockOpTypes should provide us enough.

I want filters to have the littlest possible priority. At first lets recreate all cards and headers. We'll see later what to do.

@pberezka will create transaction card, that will be reused in this. We'll talk about that later.