reset method
Drops every modifier accumulated in this configuration so far.
Modifiers chained after the reset are kept, and orderOfModifiers is
never cleared. The reset applies to this configuration only: merging the
result into another configuration no longer clears that one's modifiers.
Use the WidgetModifierConfig.reset factory when the reset must travel
with the merge, as in style.wrap(.reset()).
Implementation
WidgetModifierConfig reset() {
return merge(WidgetModifierConfig.reset());
}