"Advanced" request overview

[mdp97]

According to proposal from @emiliakaf

User story

1. As a {}
2. I want / need {}
3. So that {}

Acceptance criteria

• Criterion 1
• Criterion 2
• ...

Definition of done

• Added only after week 5
• The same for all features

[romankupkovic]

Progress:

• the request overview button on the left sidebar links to the jira native issue search (workaround)
• the dropdown buttons in the request overview tab view are showing the dropdown menus on click (design like the jira native issue search)
• the jql advanced search toggle works and toggles between the basic button filter search and the jql input form

remaining:

• alignment of the items needs improvement
• list / details view switch function for the result table not implemeted, yet