Fix console error during filter search

What does this MR do and why?

Fix console error during filter search. When users filter the dependency list, $refs.moreLink becomes undefined during component re-render. This causes a console error when trying to access $refs.moreLink.$el for the popover target.

Issue: #515455 (closed)

References

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MR acceptance checklist

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Screenshots or screen recordings

Note: in this demo, I forced display the showMoreLink to highlight the error; hence, the data might look a bit odd 😅

Before (has errors)	After (no errors)
before-has-error	after-no-error

How to set up and validate locally

Apply this patch to force display the show more link:

diff --git a/ee/app/assets/javascripts/dependencies/components/dependency_location.vue b/ee/app/assets/javascripts/dependencies/components/dependency_location.vue
index e3afeb86b992..24f41ba2ab94 100644
--- a/ee/app/assets/javascripts/dependencies/components/dependency_location.vue
+++ b/ee/app/assets/javascripts/dependencies/components/dependency_location.vue
@@ -66,6 +66,7 @@ export default {
       return Math.max(0, this.ancestors.length - VISIBLE_DEPENDENCY_COUNT);
     },
     showMoreLink() {
+      return true;
       return this.remainingDependenciesCount > 0;
     },
     nMoreMessage() {

Numbered steps to set up and validate the change are strongly suggested.

1. Clone this project: https://gitlab.com/gitlab-examples/security/security-reports
2. Run a successful pipeline
3. Go to Project > Secure > Dependency list
4. Search by component and it displays filtered dependency list

Related to #515455 (closed)