Improved Column Browser

[J24]

Here are a few improvement ideas for the column browser. I know some have been mentioned before.

1. Allow to have more than 6 columns at time.
2. Ability to resize the column width of each column.
3. Save the displayed columns and their column width to a custom view instead of applying it to all views.  
4. Option to filter both ways. That means that if I select a value on the 2nd column, it will filter the results in the 1st and 3rd columns. That way you don't have to rearrange the order of your columns when you want a column to filter the columns to its left.
5. Allow having multiple columns of the same field (like having two genre columns).