fx102: Fix linux styling. Closes #3052

scss/linux/_menupopup.scss

@@ -0,0 +1,5 @@
+menupopup, panel {
+	--panel-padding-block: 0;
+	--panel-border-radius: 2px;
+	--panel-border-color: ActiveBorder;
+}

scss/linux/_tagSelector.scss

@@ -0,0 +1,4 @@
+.tag-selector-actions {
+	display: flex;
+	align-items: center;
+}

scss/linux/elements/_noteEditor.scss

@@ -0,0 +1,10 @@
+tags-box, related-box {
+	color: Text;
+	background: Background;
+}
+
+#related-popup, #tags-popup {
+	--panel-color: Text;
+	--panel-background: transparent;
+	--panel-border-color: InactiveBorder
+}

scss/zotero-unix.scss

@@ -4,18 +4,21 @@
 // Linux specific
 // --------------------------------------------------
 
+@import "linux/about";
+@import "linux/collection-tree";
 @import "linux/createParent";
 @import "linux/editable";
 @import "linux/errorReport";
+@import "linux/feedSettings";
+@import "linux/item-tree";
+@import "linux/menupopup";
 @import "linux/search";
 @import "linux/tagsBox";
-@import "linux/about";
+@import "linux/tagSelector";
 @import "linux/virtualized-table";
-@import "linux/item-tree";
-@import "linux/collection-tree";
-@import "linux/feedSettings";
 
 // Elements
 
 @import "linux/elements/itemBox";
+@import "linux/elements/noteEditor";
 @import "linux/elements/quickSearchTextbox";