Feat/extra info refactor

[TheGreatRefrigerator]

This improves the usability of the extra info toggle and makes it working properly with alternative routes. The state of the extra info visibility is now stored and reused for subsequent and alternative routes. This works for extra info sub categories as well (e.g. waytype=highway). If the selected/new route doesn't have that sub category, it falls back to the main extra info category (e.g. from displaying waytype=highway to waytype)

Fixes two small issues:

• opacity check not working correctly
• active route index was kept when regenerating the route while using alternative routes

Includes small refactoring.

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication

[sonarcloud[bot]]

Quality Gate passed

The SonarCloud Quality Gate passed, but some issues were introduced.

1 New issue
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[sonarcloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud