GUI: make -reindex more explicit

[jonasschnelli]

When performing a -reindex with the GUI, it visually looks identical to a sync from peers.

It would be preferable to visually indicates the difference.

Things like "syncing with the network" are basically wrong.

[hebasto]

Testing master (470664f) on Linux Mint 19.3:

Cannot confirm the issue.

@jonasschnelli
Mind providing steps to reproduce "syncing with the network" with -reindex option?

[jonasschnelli]

I eventually ran into an edge case,... maybe when a corruption is detected and the GUI asks for a reindex.

[sipa]

Can you trigger the issue using -reindex-chainstate ?

[hebasto]

Can you trigger the issue using -reindex-chainstate ?

[jonasschnelli]

I can't reproduce it anymore either. I think I tried to enable txindex & had a corrupted chainstate. But manually reconstructing that doesn't reproduce it.