More annoying fixes for the emoji packs

The request to list remote instance packs is now proxied through the pleroma server because CSP + the baseName function from utils checks if there's already an http(s) in the passed address, so that it's ok to pass it whatever link the user inputs

src/api/utils.js

 const isLocalhost = (instanceName) =>
   instanceName.startsWith('localhost:') || instanceName.startsWith('127.0.0.1:')
 
-export const baseName = (instanceName) =>
-  isLocalhost(instanceName) ? `http://${instanceName}` : `https://${instanceName}`
+export const baseName = (instanceName) => {
+  if (instanceName.match(/https?:\/\//)) {
+    return instanceName
+  } else {
+    return isLocalhost(instanceName) ? `http://${instanceName}` : `https://${instanceName}`
+  }
+}