Grok filter in "Grok Creating/Editing" modal does not filter all available grok patterns

When creating or editing a grok pattern, the grok filter box has not all patterns. The amount of patterns contained appears to be depended on the show count selected in the /system/grokpatterns view.

## Expected Behavior
When using the filter box, all patterns will be searched for the filter word.

## Steps to Reproduce (for bugs)

1. Go to /system/grokpatterns and select Show: 10
2. Open the "Create pattern" modal observe that 10 patterns are available in the filter
3. Close the modal and Select Show: 100
4. Open the "Create pattern" modal and observe that now more patterns are available to be filtered

## Context
Grok pattern management is complicated. Creating or updateing patterns requires at least two tabs. One for the editing and
one for search for patterns via the search on /system/grokpatterns

## Your Environment

* Graylog Version: Graylog 4.0.5