[web] Add "Shared by" filter to "Shared with me"

[tbsbdr]

Description

User Stories

• As a user who is searching for a share I want to filter by "Shared by" so that I don't need to recall filenames.

Value

• usability
• improve file retrieval

Acceptance Criteria

• Add "Shared by" filter to "Shared with me"
• The filter is a multiselect filter (same behaviour like in admin settinigs > users > groups / roles)
• filter items are people (first and last name)
• filtering happens client-side as that's not supported on the API level, yet

Definition of ready

• Everybody needs to understand the value written in the user story
• Acceptance criteria have to be defined
• All dependencies of the user story need to be identified
• Feature should be seen from an end user perspective
• Story has to be estimated
• Story points need to be less than 20

Definition of done

• Functional requirements
  • Functionality described in the user story works
  • Acceptance criteria are fulfilled
• Quality
  • Code review happened
  • CI is green (that includes new and existing automated tests)
  • Critical code received unit tests by the developer
• Non-functional requirements
  • No sonar cloud issues

Visuals

Initial

Multiple selected items

(screenie shows groups - should be user names)