UX Enhancement: Add Back button and Active transaction display

[nftk3vin]

When initiating a bridge transaction users are required to wait for the first bridge to complete before starting a second one. This creates a bottleneck for those of us who want to quickly bridge multiple assets at the same time.

My Proposal:
Back button: Implement a back button for the current bridge transaction and allowing users to return to the previous screen without having to reload the page or open a new tab.

Active transactions display: Add a section right above the bridge modal that shows the active/pending transactions. This feature will help users keep track of their ongoing processes.

These will streamline the bridging process and improve the user experience for those who wants to quickly bridge multiple assets at the same time. (I've attached some UI mockups to show the process)