make clain button inactive forever after click
make clain button inactive forever after click

refs #1311

this is a naive and quick solution that does not rely on a success event and requires a reload to reset the state

steemit/steemit.com,steemit/steemit.com,TimCliff/steemit.com,TimCliff/steemit.com,TimCliff/steemit.com,steemit/steemit.com