Several bugfixes

- Fixed event invisibility when offset is after event's half width
- Fixed event being shown outside timeline component
- When timer reaches 24:00:00, new day is automatically started

ui/record.slint

@@ -2,6 +2,7 @@ import { VerticalBox, LineEdit, Button, ComboBox } from "std-widgets.slint";
 import { Timeline } from "timeline.slint";
 
 export component RecordWidget inherits VerticalBox {
+    callback new-day-started <=> tl.new-day-started;
     callback update-visible-time(string);
     callback start-new-event(string);
     callback chain-event(string);