fix getting the current fork

apps/remix-ide/src/app/udapp/run-tab.js

@@ -113,7 +113,10 @@ export class RunTab extends ViewPlugin {
         title,
         init: async function () {
           const options = await udapp.call(name, 'init')
-          if (options) { this.options = options }
+          if (options) { 
+            this.options = options
+            if (options['fork']) this.fork = options['fork']
+          }
         },
         provider: {
           async sendAsync (payload, callback) {

apps/remix-ide/src/blockchain/execution-context.js

@@ -131,10 +131,10 @@ export class ExecutionContext {
     if (!confirmCb) confirmCb = () => { /* Do nothing. */ }
     if (!infoCb) infoCb = () => { /* Do nothing. */ }    
     if (this.customNetWorks[context]) {
-      var network = this.customNetWorks[context]
+      var network = this.customNetWorks[context]      
+      await network.init()
       this.currentFork = network.fork
       this.executionContext = context
-      await network.init()
       // injected
       web3.setProvider(network.provider)
       await this._updateChainContext()