ui and docs improvements

frontend/src/views/Project/MembersPage/components/MemberListTab/MemberListTab.tsx

@@ -254,7 +254,7 @@ export const MemberListTab = () => {
 
   return (
     <div className="mb-6 rounded-lg border border-mineshaft-600 bg-mineshaft-900 p-4">
-      <div className="flex justify-between mb-8">
+      <div className="flex justify-between items-center mb-4">
         <p className="text-xl font-semibold text-mineshaft-100">
             Members
         </p>
@@ -264,7 +264,7 @@ export const MemberListTab = () => {
         >
             {(isAllowed) => (
                 <Button
-                colorSchema="secondary"
+                colorSchema="primary"
                 type="submit"
                 leftIcon={<FontAwesomeIcon icon={faPlus} />}
                 onClick={() => handlePopUpOpen("addMember")}