#584 Fix Help Links

[Tush-r]

Issue:

• Pressing F1 (shortcut for help) opens a page with 404 #584

Changes:

• Add functions for each help section in helpService.
• Fix all existing help links.
• Remove help link for Add multiple grid items. No matching link in updated manual. Closest link is from Tutorials section.

Description:

Create helper functions for each help section in helpService. Tried to add const frozen objects initially for help location and hashes, which added a little size and additional lookup during runtime.
Current approach uses JSDoc array of literals for hashes. This removes additional lookup object from runtime and adds build time autocomplete hints( similar to Typescript literal types).

TODO:

• Create follow up issue to add new links for missing help sections.
• Create HTTP redirects for the old links? This should fix the existing broken links in browser. Can create a map of oldLink -> newLink if required.

Testing( expected pages):

• Input: Mouse/ Touch, Scanning, Direction, Huffman, Sequential.
• Action: Asterics action, Action tab.
• Dictionaries: Add words, Edit dictionaries.
• Users: Add online user, Add offline user, Change user.
• Edit modal: General tab, Image tab, Action tab, Word forms.
• Navigation: Navigation overview, Manage grid view, Edit view.

[github-actions]

🎉 Beta deployment successful!: view the changes in live preview environment: https://gridbeta-github.asterics-foundation.org/Tush-r/584-fix-help-links/pr