Display properly long problem titles on mobile

[schlos]

Describe the bug

Long titles are not displayed properly on mobile - overlaps with the map - see screenshot.

To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

Depends on #185, and/or reduce title font to fit all content to viewable port when viewing on mobile or truncate too long titles.

Screenshots

Currently long titles on mobile are displayed as on screenshot:

Desktop (please complete the following information):

• OS: [e.g. Windows]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context

Contribution guidelines: https://codeforcroatia.org/popravito-contribution-guidelines