[kethinov]

• Added semanticForms.setInvalid(field, message, options) and semanticForms.clearInvalid(field), which mark a field invalid from your own code with a message saying why.
• Added a semanticFormsButton class, which styles a button outside a form like the ones in one.
• Added a --semanticFormsCursor variable, for the pointer over buttons, checkboxes, selects and the like.
• Added a data-display-format attribute for ranges with data-display-value, with {value} standing for the value, such as {value}%. In a customLayout element, a range with data-display-value now keeps the <output> for it up to date.
• Altered --semanticFormsPageBgColor to now set on the page's root element too, so the page can be painted with it. Forms in dark mode now set color-scheme: dark so things like date pickers and scrollbars are drawn dark.
• Added a data-semantic-forms-clear attribute for the clear button. And clearing a field now fires a change event as well as an input event.
• Fixed a keyboard listener being added every time a form was added to the page, since the enhancement runs again for each one. There's one for all of them now.
• Fixed a form inside a <dialog> or a popover, or one holding only a button, shrinking to nothing.
• Fixed a field without an id not having its control enhanced, so a switch without one wasn't given its role or dragging.
• Fixed a field whose id has characters a selector gives a meaning to, such as tag:title, stopping the enhancement of that field and every field after it.
• Fixed a help icon or required asterisk whose title holds quotes or markup breaking the label.
• Fixed data-auto-grow dropping the field's name, class, and other attributes when it turns an input into a textarea.
• Fixed enhancing a textarea firing an input event on it, which an app would take as the user having changed it.
• Updated dependencies.