More informative export process

[richiemcilroy]

Need more detail in the export process. Estimated time remaining, number of frames, etc.

Would be good to also bring back the dock icon progress indicator.

For exporting and creating the shareable link.

[linear[bot]]

CAP-297 More informative export process

[oscartbeaumont]

Everything here seems to be implemented in the latest version minus the fact that we don't show the estimated remaining during the actual export (we do however show it prior to starting the export).