Security fixes

[doekenorg]

• Add secret to short code use
• Add copy option to short code field
• Make copy popup accessible
• Add secret to view block
• Test gventry tag short code.
• Add secret to entry block

This PR fixes the Security issue of enumerating on views based on their ID.

• It adds a setting to enable this for a view, with the default for new views being set to on
  

• It the possibility to copy the short code instead of just selecting it.
  

• It also fixes a bug where the GravityView capabilities for a role were overwritten on every admin request.

[doekenorg]

The ClipboardJS plugin is accessible. Didn't add more, because this doubles up the amount of info for the screenreader.

[doekenorg]

@zackkatz I think this is it for GravityView. Unfortunately since short codes are so specific per plugin, I don't really see an abstraction to extract. At least for gravityview I've consolidated it on the Shortcode base class.

This doesn't include a filter for returning views visible only for the current user. Not sure if that should be a fix on its own.

[doekenorg]

I'm not sure how we should filter the views from the list. We can only do this based on a capability I guess, but those are not settable per post per user.

This is what I came up with, but gravityview_edit_entry should then be set for that specific view. I'm not sure how to do that.

Maybe someone has a good idea.

// in `GravityKit\GravityView\Gutenberg\Blocks::get_views()`

// Remove views the current user cannot edit.
$views = array_filter(
	$views,
	static function ( $view ) {
		return GravityView_Roles_Capabilities::has_cap( 'gravityview_edit_entry', $view->ID );
	}
);

[mrcasual]

@doekenorg, could you please:

1. Remove "Click to copy" from the column name and move it to individual inputs, ensuring accessibility

2. Allow copying using keyboard (e.g., by pressing Enter; currently it copies, but the page gets refreshed)

3. Add unit tests for the secret attribute (this can wait until after the release if we're gunning for March 14)

[mrcasual]

@doekenorg, in GravityExport Lite and GravityCalendar we display a notice to admin users when there is a missing (but expected) secret key:

Gravity Forms Calendar: Invalid feed secret provided. Update with the new shortcode: [gravitycalendar id="2" secret="22c8d575a29e" /]

For consistency purposes, let's do the same here.

[doekenorg]

@mrcasual only the unit test thing remains; but I think this can be released.

[mrcasual]

@doekenorg, please hide the "click to copy" completely :)

Instead, add aria-label,aria-describedby and title.

[mrcasual]

@doekenorg, copying to clipboard works great. Let's implement #1983 (comment) and we can then merge this.

[doekenorg]

@mrcasual allright, that's in there. I used a WP_Error to be consistent; and not introduce an Exception, although that would have been my first solution ;-)

The notice is generic because it is re-used for different short codes ([gravityview, [gventry and [gvfield); and It doesn't provide the original shortcode for context; so this was the easiest solution.

[crbdev]

@doekenorg I just noticed that, on the "All Views" page, in the shortcode column, it says "Copied!" even before clicking on it.

[doekenorg]

This was a styling issue; cached CSS.