HiveSigner integration

Description

Login and perform operations with HiveSigner.

For more details, please refer to https://peakd.com/hive-139531/@good-karma/imagehoster-hivesigner-and-condenser-bounty#@roomservice/re-good-karma-qd5qsb

The Merge Request contains almost the same change as condenser!74 (merged), except some minor differences.

Relevant Issues

Fixes: condenser#43 (closed)

src/shared/UniversalRender.jsx

@@ -429,6 +429,7 @@ function getUrlFromLocation(location) {
         url = url.replace(/\/password$/, '/transfers');
     if (url.indexOf('/delegations') !== -1)
         url = url.replace(/\/delegations$/, '/transfers');
+    // Replace /login/hivesigner with /login.html to resolve data correctly for apiGetState
     if (url.indexOf('login/hivesigner') !== -1)
         url = url.replace('/login/hivesigner', '/login.html');