Set default branch to main for clone creation (#662)

Author: NikolayS

ui/packages/shared/pages/CreateClone/index.tsx

@@ -114,7 +114,8 @@ export const CreateClone = observer((props: Props) => {
 
       const branches = (await stores.main.getBranches(props.instanceId)) ?? []
 
-      let initiallySelectedBranch = branches[0];
+      const mainBranch = branches.find((branch) => branch.name === 'main')
+      let initiallySelectedBranch = mainBranch?.name ?? branches[0];
 
       if (initialBranch) {
         const foundBranch = branches.find((branch) => branch.name === initialBranch)