[Security Solution] Indicator Match Field dropdown is slightly moved to the left when creating an Indicator match rule

[vgomez-el]

Describe the bug: When creating a new Indicator Match rule "Field" dropdown is moved to the left, and gets slightly out of the visible area as well as its content after selecting the "Indicator index field" field.

Kibana/Elasticsearch Stack version:

8.14 BC3

Browser and Browser OS versions:

Google Chrome Version 123.0.6312.107

Original install method (e.g. download page, yum, from source, etc.):

Cloud deployment

Functional Area (e.g. Endpoint management, timelines, resolver, etc.):

Indicator Match Rule Creation

Steps to reproduce:

1. Create a new Indicator Match Rule
2. Fill Index patterns, custom query and indicator index patterns with values
3. Start typing a field and select it from the dropdown
4. Start typing an Indicator index field and select it from the dropdown

Current behavior: After selecting the "Indicator index field", Field dropdown is moved to the left, and gets slightly out of the visible area as well as its content

Expected behavior: All components should be clearly visible and inside the visible area.

Screenshots (if relevant):

https://github.com/elastic/kibana/assets/120487607/26cee5d2-ee27-4bce-af99-837f747c7de2

[elasticmachine]

Pinging @elastic/security-detections-response (Team:Detections and Resp)

[elasticmachine]

Pinging @elastic/security-solution (Team: SecuritySolution)

[elasticmachine]

Pinging @elastic/security-detection-engine (Team:Detection Engine)