diff --git a/chrome/content/zotero/components/button.jsx b/chrome/content/zotero/components/button.jsx
index c55285243b..93af1b1dd1 100644
--- a/chrome/content/zotero/components/button.jsx
+++ b/chrome/content/zotero/components/button.jsx
@@ -57,7 +57,7 @@ class Button extends PureComponent {
 	}
 	
 	get menuMarker() {
-		if (!Zotero.isNode && !Zotero.isMac) {
+		if (!Zotero.isNode && Zotero.isLinux) {
 			return this.props.isMenu && <span className="menu-marker"/>
 		}
 		return this.props.isMenu && <IconDownChevron className="menu-marker"/>
diff --git a/scss/abstracts/_variables.scss b/scss/abstracts/_variables.scss
index 5b874d3fb8..70571a7d29 100644
--- a/scss/abstracts/_variables.scss
+++ b/scss/abstracts/_variables.scss
@@ -62,7 +62,6 @@ $separator-width: 1px;
 // Buttons
 // --------------------------------------------------
 
-$btn-icon-padding: $space-min + 1px;
 $btn-disabled-opacity: 0.5;
 
 // Z-index master list
diff --git a/scss/components/_button.scss b/scss/components/_button.scss
index 1c06c5bee3..a18d4825f7 100644
--- a/scss/components/_button.scss
+++ b/scss/components/_button.scss
@@ -19,8 +19,6 @@
 }
 
 .btn-icon {
-  padding: $btn-icon-padding;
-
   .icon {
     &:first-child {
       margin-left: -5px;
diff --git a/scss/components/_tag-selector.scss b/scss/components/_tag-selector.scss
index 96a86825fd..c56778ce0b 100644
--- a/scss/components/_tag-selector.scss
+++ b/scss/components/_tag-selector.scss
@@ -40,12 +40,12 @@
 }
 
 .tag-selector-filter {
-	flex: 1 0 40px;
+	flex: 1 0;
 	min-width: 40px;
 }
 
 .tag-selector-actions {
-	flex: 0 0 42px;
+	flex: 0 1;
 	display: block;
 	white-space: nowrap;
 	background-color: inherit;
diff --git a/scss/zotero-react-client-linux.scss b/scss/zotero-react-client-unix.scss
similarity index 100%
rename from scss/zotero-react-client-linux.scss
rename to scss/zotero-react-client-unix.scss