datetimeIconButton moves to icon_button.go as iconAction(c, icon, label)
and replaces the identical copies in Dialog close, PasswordInput toggle
and AppShell collapse. Hover and press now set Text on every caller,
including the date and time pickers, which kept TextMuted on hover.
Image retry (bordered, danger ink), TagsInput remove (14 DIP icon, no
press state) and Tag close (12 DIP icon, fade) are different buttons
and stay as they are.
Every component result type now names its element Element instead of
embedding *ui.Element. The eleven element-plus-changed results
(AccordionView, CarouselView, CollapsibleView, ImageViewerView,
PaginationResult, StepsResult, SidebarResult, TabsResult, RatingParts,
FileDropZoneParts, TransferParts) fold into ChoiceResult.
Fixes four Gallery demos where .Width(...).Changed() read the element's
flag instead of the component's: Accordion, MultiSelect, Cascader,
TreeSelect. TestDataAccordionDemoLogsChange covers the Accordion.
ZacharyZhang-NY