Fix: Chapter markers and seek bar were not aligned with each other

Theme/ElegantFin-theme-nightly.css

@@ -786,6 +786,7 @@ progress+span {
 
 .mdl-slider-background-flex-container {
     /* backdrop-filter: var(--blurSmallest); */
+    padding: 0;
 }
 
 .mdl-slider-background-flex {
@@ -809,6 +810,10 @@ progress+span {
     background: var(--uiAccentColor);
 }
 
+.sliderMarkerContainer {
+    margin: 0 .1em;
+}
+
 .sliderMarker.watched {
     background-color: var(--uiAccentColor);
 }