Ability to Customize the Self-help Content and Layout in Customer Portal

Suggestions

It should be possible to:

1. Customize the label of the search box e.g. change from "Find a solution" or "What do you need help with?" to something else according to specific use-cases
2. Customize the font colour of placeholder "What do you need help with?" to different colours according to user need.
3. Add a text line or paragraph to signify the general usage of the request type list or guide customers what to do in case the search box doesn't return any result
4. Ability to change or reorganize the way the different items are shown and the space they take from the main screen
5. Ability to customize customer portal banner background
   Just like JIRA Cloud https://confluence.atlassian.com/servicedeskcloud/customize-the-help-center-954239157.html

These should apply to both Help Center and individual Service Desks.