Customize layout of Knowledge Base categories in Customer Portal

Issue Summary

Currently, KB categories appear at the top and the button to raise requests in the portal. This becomes problematic when there are a lot of KB categories as the customer would have to scroll down to the bottom of the page to raise tickets.
There should be an option to customize the position to either top or bottom on the project basis.

Steps to Reproduce

1. Create some KB categories in your Service Desk project
2. Check the project in the portal, you would see that categories are shown at the top and you would have to scroll down to the bottom of the page to find the 'Need to raise a request?' button

Expected Results

There should be an option to change the order of categories and request forms
It would be good to also be able to customize the "Need to raise a request? Contact us!" button link as well.

Actual Results

There is no option to customize it

Workaround

no workaround

Proposed Solution

Improve the appearance of the KB categories by,

1. Reducing the whitespace of the categories so the can be listed more compactly and reduce space on screen.
2. Allow the use of columns instead of a sinle row so that the category list is shortened. 
3. Provide an option to change the order of categories and request forms
4. It would be good to also be able to customize the "Need to raise a request? Contact us!" button link as well.