Preferences: Update context-sensitive help page links to new structure

[skyper]

After the refactoring of preferences dialog, I finally have split the wiki pages and created one page per register, see preferences dialog. Now ,the links to the help pages need to be adjusted accordingly, see Help System.

[simon04]

Wow, thank you for updating the help!

[simon04]

In 17648/josm:

fix #20652 - Preferences: Update context-sensitive help page links to new structure

[skyper]

Thanks, well, I only adapted to the new structure, so far.
Now the real update of documentation and screenshot updates can start. Btw, the internal help browser does not scale images, e.g. big screenshots do not work well.

[simon04]

I've recreated all preference screenshots: ​https://drive.google.com/drive/folders/1ArQJg-lPH8QVeypS-sUz1b1FuXfFLQ-m?usp=sharing (the subdirectory hidpi/ contains the unscaled screenshots)

[skyper]

Thanks. The dialog for adding rules or presets from file/url are missing and the dialog for adding additional icon path for presets but that does not matter. Did not check the OAuth dialogs but by chance, you did not changed the OAuth icon, did you?

[simon04]

I've added the dialogs for adding rules or presets from file/url – v2/ in the link above

For recent OAuth changes see #20244. I've added screenshots as well (no worries, I've revoked the token visible in the screenshots)

[skyper]

Did not take a look at the v2, yet, but:

• Validator rules tab is missing in v1. Instead the test tab has two files (upper and lower half).
• r17652 did change one screenshot, again.

Anyway, I think words are better than images in most cases and the screenshots are just nice eyes-catcher. The more descriptive ones need to be handmade, to highlight some parts.

Hope, I have found most of the broken links.

[taylor.smock]

In 18389/josm:

fix #21918: Proxy preferences does not have the correct help

Remove the HelpUtil.setHelpContext in ProxyPreferencesPanel, as this overrides
the help context set in ProxyPreference#getHelpContext (see #20652). As the
correct help topic is the same as that set in ProxyPreference, we just remove
the setHelpContext call in ProxyPreferencesPanel.