InputfieldTinyMCE extraCSS setting overwritten by Konkat Theme

[romaincazier]

The extraCSS setting of InputfieldTinyMCE is being overwritten by this hook InputfieldTinyMCESettings::prepareSettingsForOutput from the Konkat Theme.

This is a regression introduced by processwire/processwire@a3bdb86.

Two observations:

• When reaching InputfieldTinyMCESettings.php#L742, $diffSettings doesn’t have the default content_style property and thus Konkat Theme adds its own in the hook to set the color-scheme which results in the missing extraCSS set in the module settings (because the js configuration ends up taking priority over the default one)
• Right after, the content_style is unset from $mergeSettings to not appear in the data-settings attribute, but it is set again by the same hook at InputfieldTinyMCESettings.phpL#794

I’m not sure to understand how this whole thing works but I wonder if there could be another way to set the color-scheme? Or ensure the js configuration doesn’t completely overwrite content_style but instead append to it? Or maybe it’s something else entirely...