refactor: Reduce width of dropdown toggle button

frontend/src/App.vue

@@ -1523,6 +1523,11 @@ button.delete:focus {
 				border-radius: 0 @border-radius @border-radius 0;
 				padding-left: 10px;
 			}
+
+			&.dropdown-toggle {
+				padding-left: 5px;
+				padding-right: 5px;
+			}
 		}
 
 		.input {

frontend/src/components/AdvancedTable.vue

@@ -33,7 +33,7 @@
 								>
 								Filters
 							</button>
-							<button class="button">
+							<button class="button dropdown-toggle">
 								<i class="material-icons">
 									{{
 										showFiltersDropdown
@@ -324,7 +324,7 @@
 								>
 								Columns
 							</button>
-							<button class="button">
+							<button class="button dropdown-toggle">
 								<i class="material-icons">
 									{{
 										showColumnsDropdown

frontend/src/components/RunJobDropdown.vue

@@ -21,7 +21,7 @@
 	>
 		<div class="control has-addons" ref="trigger">
 			<button class="button is-primary">Run Job</button>
-			<button class="button">
+			<button class="button dropdown-toggle">
 				<i class="material-icons">
 					{{ showJobDropdown ? "expand_more" : "expand_less" }}
 				</i>