Handle different bookmarks item heights better

Bookmark items in the toolbar may not be same height on all systems,
generally the text size on Linux is bigger than on Windows for example.
This patch changes the height to use min-height on bookmark items and
removes their individual block padding. Thus, thee effectively have
variable block-padding depending on the text size.

In addition this patch removes few pre-proton workarounds because those
don't need to be supported any more.

chrome/autohide_bookmarks_and_main_toolbars.css

@@ -1,28 +1,18 @@
 /* Source file https://github.com/MrOtherGuy/firefox-csshacks/tree/master/chrome/autohide_bookmarks_and_main_toolbars.css made available under Mozilla Public License v. 2.0
 See the above repository for updates as well as full license text. */
 
-/* Dummy variable to support both versions 89-90 */
-:root{ --tab-block-margin: var(--proton-tab-block-margin) }
-
 #navigator-toolbox{
-  --uc-bm-height: 22px; /* Might need to adjust if the toolbar has other buttons */
+  --uc-bm-padding: 4px; /* Vertical padding to be applied to bookmarks */
-  --uc-bm-padding: 2px; /* Vertical padding to be applied to bookmarks */
+  --uc-bm-height: calc(20px + 2 * var(--uc-bm-padding)); /* Might need to adjust if the toolbar has other buttons */
   --uc-navbar-height: -40px; /* navbar is main toolbar. Use negative value */
   --uc-autohide-toolbar-delay: 600ms; /* The toolbar is hidden after 0.6s */
 }
 
-:root[uidensity="compact"] #navigator-toolbox{ --uc-bm-padding: 1px; --uc-navbar-height: -32px }
+:root[uidensity="compact"] #navigator-toolbox{
-:root[uidensity="touch"] #navigator-toolbox{ --uc-bm-padding: 6px }
+  --uc-bm-padding: 1px;
-
-@media (-moz-proton){
-  #navigator-toolbox{
-     --uc-bm-height: 26px; /* Might need to adjust if the toolbar has other buttons */
-  }
-  :root[uidensity="compact"] #navigator-toolbox{
   --uc-navbar-height: -34px;
-    --uc-bm-height: 23px;
-  }
 }
+:root[uidensity="touch"] #navigator-toolbox{ --uc-bm-padding: 6px }
 
 :root[sessionrestored] #nav-bar,
 :root[sessionrestored] #PersonalToolbar{
@@ -53,10 +43,16 @@ See the above repository for updates as well as full license text. */
   position: relative;
 }
 
-:root[sessionrestored]:not([customizing]) #navigator-toolbox{ margin-bottom:  calc(2px - var(--uc-bm-height) - 2 * var(--uc-bm-padding) + var(--uc-navbar-height)); }
+:root[sessionrestored]:not([customizing]) #navigator-toolbox{
+  margin-bottom:  calc(0px - var(--uc-bm-height) + var(--uc-navbar-height));
+}
+#PlacesToolbarItems > .bookmark-item {
+  min-height: calc(var(--uc-bm-height) - 4px); /* Bookmarks have 2px block margin */
+  padding-block: 0px !important;
+}
 
-#PlacesToolbarItems > .bookmark-item,
 #OtherBookmarks,
+#PlacesChevron,
 #PersonalToolbar > #import-button{
   padding-block: var(--uc-bm-padding) !important;
 }
@@ -94,7 +90,10 @@ See the above repository for updates as well as full license text. */
   transition-delay: 100ms !important;
   transform: rotateX(0);
 }
-
+/* This makes the tab notification box show immediately below tabs, otherwise it would break the layout */
+:where(#titlebar,#tab-notification-deck){
+  -moz-box-ordinal-group: 0;
+}
 /* Show when cursor is over popups/context-menus - cannot control which ones */
 /*
 #mainPopupSet:hover ~ box > toolbox > .browser-toolbar{
@@ -103,11 +102,15 @@ See the above repository for updates as well as full license text. */
 }
 */
 
-/* Uncomment to enable compatibility for multi-row_bookmarks.css */
+/* Uncomment the next part to enable compatibility for multi-row_bookmarks.css
-/* This would break buttons placed in the toolbar but that is likely not happening if you are using multi-row setup  */
+ * This would break buttons placed in the toolbar,
+ * but that is likely not happening if you are using multi-row setup
+ */
+ 
 /*
+#navigator-toolbox{ margin-bottom: var(--uc-navbar-height) !important; }
 #PersonalToolbar:not([customizing]){
-  position: fixed;
+  position: fixed !important;
   display: block;
   margin-bottom: 0px !important;
 }