Added new actions for jumping to specific events

[alex-w]

Added new actions for jumping to defined moments in diurnal motion of selected objects.

Description

I've added 6 new actions with empty shortcuts, which allow users jumping to defined moments in diurnal motion of selected objects. For example you selected Jupiter on some altitude this evening and you can now jumping to the moment when Jupiter reaches current altitude this morning, next evening and morning, and previous evening and morning.

See idea in issue #484

Screenshots (if appropriate):

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• This change requires a documentation update

How Has This Been Tested?

I've assign shortcuts to the new actions and runs these shortcuts

Test Configuration:

• Operating system: macOS Monterey (12.0.1)

Checklist:

• My code follows the code style of this project.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[github-actions]

Great PR! Please pay attention to the following items before merging:

Files matching src/**/*.cpp:

• Are possibly unused includes removed?

This is an automatically generated QA checklist based on modified files

[alex-w]

@Atque @A-j-K please comment this new feature (I've asked you as mature user of Stellarium with good astronomy background)

[Atque]

I have tried it now, and it works fine for me. This tool is very handy when selecting evenings/mornings to view Mercury.

BTW Windows complained when I tried to build first, because the file names were too long. You might want to rename the branch to something shorter.

[alex-w]

BTW Windows complained when I tried to build first, because the file names were too long. You might want to rename the branch to something shorter.

Thanks for report!

[github-actions]

Hello @alex-w! Please check the fresh version (development snapshot) of Stellarium:
https://github.com/Stellarium/stellarium-data/releases/tag/weekly-snapshot

[github-actions]

Hello @alex-w! Please check the latest stable version of Stellarium:
https://github.com/Stellarium/stellarium/releases/latest