Use border-box everywhere and use svelte loop keying

res/static/misc/pdf-viewer/web/viewer.css

@@ -118,7 +118,6 @@
 .annotationLayer .buttonWidgetAnnotation.radioButton input {
   background-color: rgba(0, 54, 255, 0.13);
   border: 1px solid transparent;
-  box-sizing: border-box;
   font-size: 9px;
   height: 100%;
   margin: 0;
@@ -298,7 +297,6 @@
   text-align: inherit;
   text-decoration: inherit;
   vertical-align: inherit;
-  box-sizing: border-box;
   background: transparent;
 }
 
@@ -1538,7 +1536,6 @@ html[dir="rtl"] .splitToolbarButtonSeparator {
      -moz-user-select: none;
           user-select: none;
   cursor: default;
-  box-sizing: border-box;
 }
 
 html[dir="ltr"] #toolbarViewerLeft > .toolbarButton:first-child,
@@ -1840,7 +1837,6 @@ html[dir="rtl"] .toolbarButton.pdfSidebarNotification::after {
   min-width: 100%;
   white-space: normal;
   border-radius: 0;
-  box-sizing: border-box;
 }
 html[dir="ltr"] .secondaryToolbarButton {
   padding-left: 36px;
@@ -2420,7 +2416,6 @@ html[dir="rtl"] #documentPropertiesOverlay .row > * {
   background-color: rgba(255, 255, 0, 0.1);
   color: rgba(0, 0, 0, 1);
   border: solid 1px rgba(255, 0, 0, 0.5);
-  box-sizing: border-box;
 }
 
 #viewer.textLayer-hover .textLayer span:hover {