Further improvements for filter elements

InvenTree/InvenTree/static/css/inventree.css

@@ -295,8 +295,6 @@
     vertical-align: middle;
     margin: 1px;
     padding: 2px;
-    background: #eee;
-    border: 1px solid #eee;
     border-radius: 3px;
 }
 
@@ -322,8 +320,6 @@
     zoom: 1;
     padding-left: 3px;
     padding-right: 3px;
-    padding-top: 2px;
-    padding-bottom: 2px;
     border: 1px solid #aaa;
     border-radius: 3px;
     background: #eee;
@@ -332,6 +328,12 @@
     margin-right: 5px;
 }
 
+.filter-button {
+    padding: 2px;
+    padding-left: 4px;
+    padding-right: 4px;
+}
+
 .filter-input {
     display: inline-block;
     *display: inline;