handle other kind of contract file

apps/remix-ide/src/app/tabs/runTab/contractDropdown.js

@@ -201,7 +201,10 @@ class ContractDropdownUI {
       this.selectContractNames.style.display = 'none'
       this.enableContractNames(true)
       this.enableAtAddress(true)
-    } else if (/.(.sol)$/.exec(currentFile)) {
+    } else if (/.(.sol)$/.exec(currentFile)
+      || /.(.vy)$/.exec(currentFile)
+      || /.(.lexon)$/.exec(currentFile) 
+      || /.(.contract)$/.exec(currentFile)) {
       this.createPanel.style.display = 'block'
       this.orLabel.style.display = 'block'
       this.contractNamesContainer.style.display = 'block'