MDL-70100 theme_boost: quiztimer zindex fix

theme/boost/scss/moodle/modules.scss

@@ -1275,7 +1275,7 @@ div#dock {
     position: sticky;
     justify-content: end;
     top: $navbar-height + 5px;
-    z-index: $zindex-modal;
+    z-index: $zindex-sticky;
     #quiz-timer {
         border: $border-width solid $red;
         background-color: $white;

theme/boost/style/moodle.css

@@ -17569,7 +17569,7 @@ div#dock {
   position: sticky;
   justify-content: end;
   top: 55px;
-  z-index: 1050; }
+  z-index: 1020; }
   #quiz-timer-wrapper #quiz-timer {
     border: 1px solid #ca3120;
     background-color: #fff; }

theme/classic/style/moodle.css

@@ -17796,7 +17796,7 @@ div#dock {
   position: sticky;
   justify-content: end;
   top: 55px;
-  z-index: 1050; }
+  z-index: 1020; }
   #quiz-timer-wrapper #quiz-timer {
     border: 1px solid #ca3120;
     background-color: #fff; }