Custom errors on task create

[maaktweluit]

When an exception occurs in the golemapp after the create task button is clicked the GUI shows a funds / top up error.

Please allow different errors to be shown here:

• Unknown error, check logs and send user to chat
• Funds error, top up

Can be added later for example:

• Graceful shutdown in progress, you cannot create new tasks, button to disable shutdown
• Invalid ETH withdraw address checksum
• No longer connected to the network, re-connect and try again
• Too many tasks in progress
• Etc...

[maaktweluit]

This comment is removed since it is not related

It was related to withdraw checksums and has been solved in #388

[mdtanrikulu]

For now we just show the message from the golem side. Next step should be provide more practical solutions as written above.