Store column width in state

[cssuh]

Need to store column width in state if manually changed by the user, so that it will be the same if they switch to another tab (for example messages tab) and then back.

1. Drag a column to be a specific width other than the default
2. Swap to messages pane
3. Come back to results pane

Expected:
Column width is still expanded to dragged width

Actual:
Column width is set back to the default width