Make Field Selection the first step while adding/editing Aggregation in Vis Builder

[LDrago27]

Is your feature request related to a problem? Please describe.

Currently when an user tries to add an Aggregation in Vis Builder, User needs to select the type of aggregation and then select the field and rest of the sub params. The order of user interactions are not highly intuitive. In order to increase the intuitiveness and ease of use of the features, the options should be reordered so that User selects the field before selecting the Aggregation.

Describe the solution you'd like

User should be able select the field Name before selecting the Aggregation type while creating a new Aggregation.

Describe alternatives you've considered

No