user can click on button to claim UDs
db updated by migration

fix subscription in substrate-interface not handled correctly in thread_safe_substrate_interface.py

TLS problem fixed by #7159f83a

use an "utility.batch" with a remark call

add unsafe_api_exposed filed in Node entity
Break database compatibility

do not wait for finalization, only inclusion in a block to get a faster transfer
fix fee button not enabled when sender wallet locked

we can close a tab by clicking with the mouse wheel
a context menu is available on tab titles

todo:
use async to request network
use batch get_balances to speed request