Issue goes back since we stopped using LISTROW button to draw item's name (i.e. since we have custom buttons in list items!).
This commit:
* Adds a new flag to uiBlock, UI_BLOCK_LIST_ITEM, to mark blocks used for each list item.
* Adds a new button type, LISTLABEL, which basically behaves exactly as LABEL, but uses wcol_list_item color set.
* When uiItemL is called, it checks whether current block has UI_BLOCK_LIST_ITEM set, and if so, switch produced button to LISTLABEL type.
* Adds a new helper func, ui_layout_list_set_labels_active, called after the active list item has been "drawn", to set all LISTLABEL buttons as UI_SELECT.
Note custom widget_state_label() was removed, in interface_widgets.c, as it did nothing more than default widget_state().
Thanks to Brecht for the review and advices.
063be8fdc0