[ML] DF Analytics - memory estimation overrides manually set value

[pheyos]

Found in version

• 7.7.0 b2137

Browser

• Chrome

Steps to reproduce
In the classification (or regression) job wizard:

• Change the training percent slider
• Quickly update the model memory limit

Expected result

• The manually set model memory limit stays

Actual result

• When the request returns, the manually specified value is replaced:
  

Additional information

• This happens often on cloud clusters, where request round trip times are higher
• Ideas discussed on slack so far:
  • Disable the model memory input until the estimation request returned
  • Never replace manually set model memory values but display a warning / disable the create button if the model memory is smaller than the estimation

[elasticmachine]

Pinging @elastic/ml-ui (:ml)