Accession browse: Add tabs
Upgrade the existing Tabs component to include an actions area as shown below:
The actions area can contain a number of other components.
Use the new component in the accession browser page component with tabs "Accessions", "Overview" and "Map" and a dummy Action button.
Using the component
<Tabs tab={ currentTab } actions={ <Some component /> }>
<Tab name="data" to={ `/a/` }>Accessions</Tab>
<Tab name="overview" to={ `/a/overview/` }>Overview</Tab>
<Tab name="map" to={ `/a/map/` }>Map</Tab>
</Tabs>