Last used defaults for uploaders

[timlinux]

For both the meta and the indicator spreadsheet importers, it will be great if the modal can remember as much of the details from the last session as possible,

The statefulness should be per-indicator so that if they open the same sheet from two different indicator uploaders, it remembers which tabs, columns etc were used for that indicator the last time.

[meomancer]

It is impossible to put the file @timlinux will just put the others input as the last selection

[meomancer]

Updated The sessions is saved per indicator So although the file is same, the state is different per indicator and we need to reselect again