Combine componentWillMount and getInitialState

[jacobbaskin]

Description

There is a bug when setting scrollToRow/scrollToColumn before the initial render of a FixedDataTable: because we compute the state before setting this._rowToScrollTo, we don't scroll appropriately. To fix this bug, and avoid others like it, we combine getInitialState with componentWillMount (which run one after another anyway) into one function and sequence its operation appropriately.

Motivation and Context

Fixes facebook/fixed-data-table/#458

How Has This Been Tested?

Ran 'npm run test'; also tested that this fixed scrollToRow within an internal project.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.

[KamranAsif]

LGTM. Going to let @wcjordan give this a once over as well

[wcjordan]

lgtm as well. Thanks!

[jacobbaskin]

Thanks both of you! When do you next plan to cut a release? Would love to get fixed version from NPM.

[KamranAsif]

Published 0.7.3

[jacobbaskin]

Thanks!