Launchpad does not recognize deposits

Launchpad seems to not recognize deposits in the following cases:

1. Takes more than 20 mins for the transaction to get included in a block
2. If the transaction gets replaced with one with higher gas
3. If the user presses "reject"

In all the above cases it does not seem to alow the user to re-do the deposit.

Start by tracing the deposit transaction handling and reproduce the three reported cases: delayed inclusion, replacement with higher gas, and user rejection. Done means the launchpad recognizes the resulting state and lets the user retry the deposit in each case.

Written by the indexing model from the issue text.