Issue with long name does not fit in dependencies dropdown list

[CrowMash]

• Gitea version (or commit ref): 1.7.0
• Git version: 2.1.4
• Operating system: Debian 8
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes https://try.gitea.io/CrowMash/Test/issues/2 (try adding the issue 1 in dependency)
  • No
  • Not relevant
• Web browser: Chrome 72.0.3626.121

Description

If you try to add a dependency with a long name, it does not fit in the dropdown list.

Screenshots

[stevegt]

Related to #4479

[lunny]

Is it duplicated?

[stevegt]

@lunny I think it's probably not a dup -- #6262 looks like it just needs an HTML/CSS fix, while #4479 has to do with issue search code. I only linked the two because anyone using dependencies and fixing one bug might be interested in fixing the other -- they are going to see both symptoms in the same input field. (I was hoping to tackle both bugs two months ago but life has happened to me again.)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs during the next 2 weeks. Thank you for your contributions.