removed the deduplicate select-first-option code now in favor of the one in firstUpdate
also automatic convert empty_label for et2-select multiple into a placeholder
- Promote image styling from Et2LinkAppSelect to all Selects
- fix double scrollbar if there are a lot of options
- different cursor for editable tags
- align +# right to make it stand out a little more
- fix missing app select
- add clear button
- use request() instead of json() to query server
- add optional class property to SelectOption
- move cleaning select options to its own function so we can use it anywhere
- Use separate render to keep local / remote options separate. Local options stay in select_options.
- new web-components are unconditionally replacing them via the preprocessor
- some widgets (eg. et2_description) could not be removed as other legacy widgets are extending them, but they are no longer registered
- as there are many places using et2_createWidget('description', ...), et2_description returns now web-components for no longer existing widgets
- historylog widget now uses webcomponents for timestamp & user, and whenever possible for values
- History::get_rows() formats customfield date/date-time values as needed
- implement setDetachedAttributes(), if nextmatch & historylog are calling them on webcomponents, might as well use that to set what they pass
* egw.jsonq() now always returns a promise like egw.request(), still supporting old callback syntax
* egw.link_title(_app, _id, _callback, _context, _force_reload) supports boolean values for _callback (to not break existing code)
- false: just a cache lookup (like current call with just 2 parameters), returning null, if no title is cached, or the title
- true: always return a promise, which might already be resolved, if title was cached
- function: also returns a promise and calls the callback
--> calling egw.link_title(_app, _id) without 3rd parameter is deprecated now (gives a console.trace), to be changed in future to always return a promise, unless called with false, to just return a cache-lookup
* Et2SelectAccountReadonly and et2_link_widget is changed to use the new/updated syntax with promises
- Remove margin from input,button,select
- Fix some spacing issues
- Switch selects from display:inline-block to display:block so they take up all parent's space
- Let background (required) color show through select tag
- Some layout tweaks on mail account template
- Dates have their input as slotted, not internal
- Selects have .select_options, not .get_select_options()
- Remove this.egw().lang() use from Et2InvokerMixin._invokerTemplate()
