Mercury Template 12 for OpenCms

This is a major update of the Mercury template. Mercury has been used to create hundreds of websites since the initial 11.x release in 2019. A lot of fine-tuning and issue fixing has been included in this release. Mercury 12 should be largely backward compatible with the 11 version.

• Updated for OpenCms 12.0.
• Configurable cookie banner that allows users to opt-out of statistical and external cookies.
• Contact informations in lists.
• iCalendar links for events.
• Media element extended with SoundCloud audio, external video and external audio option.
• Added several options to show the copyright information for images.
• Content sections can be displayed as image tile.
• Content sections can be hidden based on the screen size.
• Image size for content sections can be set separately for 'desktop' and 'mobile'.
• Added center / left / right alignment options to the content section.
• Decoys linking to an invalid content are automatically hidden.
• Improved the CAPTCHA session handling for the webform.
• Using maplibre-gl instead of mapbox-gl to display OSM vector maps.
• Using 'Fork awesome' instead of 'Font awesome' for icons.
• The SCSS has been improved for several edge cases.
• Bootstrap updated to 4.6.0.
• jQuery updated to 3.6.0.
• Using recent dart sass to compile the SASS sources to CSS.
• All other NPM dependencies have also been updated to a recent version.