Add UI element to change the size of a result page

User story:

As a user, I want to be able to change the number of result items that is shown to me when I search for contacts / devices / platforms / configurations so that I'm able to see more result items on a page.

Acceptance criteria:

• I'm able to adjust the number of result items shown on a page
• The number of result items on a page changes to the selected number
• The number of result items is reflected in the URL so that I can send a link to the result to a colleague