Improve column width allocation in data tables

Optimize table widgets to make the column width can be changed and saved

## What?

if the table show a property with very long name and the value of the property is short, there will be too many blanks there.

for example
the ipv4 address will be 15 characters long (MAX) ,but if the property name is long

## Why?

if a table contains many columns ,i want to see the entire table, and do not want to scroll the table. beacuse scroll the table horizontally is difficult using mouse ,i must first scoll down and see the horizontal bar ,then scroll horizontally

## Your Environment

* Graylog Version: Graylog 3.1.3+cda805f on localhost (Oracle Corporation 1.8.0_171 on Linux 3.10.0-1062.4.1.el7.x86_64)
* Elasticsearch Version:
* MongoDB Version:
* Operating System: centos 7.9
* Browser version: 78.0.3904.97