drop the flex-grow: 10 in favor of auto margin utils

docs/components/navbar.md

@@ -46,7 +46,7 @@ Here's an example of all the sub-components included in a responsive light-theme
   <a class="navbar-brand" href="#">Navbar</a>
 
   <div class="collapse navbar-collapse" id="navbarSupportedContent">
-    <ul class="navbar-nav">
+    <ul class="navbar-nav mr-auto">
       <li class="nav-item active">
         <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
       </li>
@@ -256,7 +256,7 @@ Mix and match with other components and utilities as needed.
   </button>
   <a class="navbar-brand" href="#">Navbar w/ text</a>
   <div class="collapse navbar-collapse" id="navbarText">
-    <ul class="navbar-nav">
+    <ul class="navbar-nav mr-auto">
       <li class="nav-item active">
         <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
       </li>
@@ -286,7 +286,7 @@ Theming the navbar has never been easier thanks to the combination of theming cl
     <a class="navbar-brand" href="#">Navbar</a>
 
     <div class="collapse navbar-collapse" id="navbarColor01">
-      <ul class="navbar-nav">
+      <ul class="navbar-nav mr-auto">
         <li class="nav-item active">
           <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
         </li>
@@ -314,7 +314,7 @@ Theming the navbar has never been easier thanks to the combination of theming cl
     <a class="navbar-brand" href="#">Navbar</a>
 
     <div class="collapse navbar-collapse" id="navbarColor02">
-      <ul class="navbar-nav">
+      <ul class="navbar-nav mr-auto">
         <li class="nav-item active">
           <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
         </li>
@@ -342,7 +342,7 @@ Theming the navbar has never been easier thanks to the combination of theming cl
     <a class="navbar-brand" href="#">Navbar</a>
 
     <div class="collapse navbar-collapse" id="navbarColor03">
-      <ul class="navbar-nav">
+      <ul class="navbar-nav mr-auto">
         <li class="nav-item active">
           <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
         </li>
@@ -439,7 +439,7 @@ With no `.navbar-brand` shown in lowest breakpoint:
   </button>
   <div class="collapse navbar-collapse" id="navbarTogglerDemo01">
     <a class="navbar-brand" href="#">Hidden brand</a>
-    <ul class="navbar-nav mt-2 mt-lg-0">
+    <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
       <li class="nav-item active">
         <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
       </li>
@@ -468,7 +468,7 @@ With a brand name shown on the left and toggler on the right:
   <a class="navbar-brand" href="#">Navbar</a>
 
   <div class="collapse navbar-collapse" id="navbarTogglerDemo02">
-    <ul class="navbar-nav mt-2 mt-md-0">
+    <ul class="navbar-nav mr-auto mt-2 mt-md-0">
       <li class="nav-item active">
         <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
       </li>

scss/_navbar.scss

@@ -128,7 +128,6 @@
 // Custom navbar navigation built on the base `.nav` styles.
 
 .navbar-nav {
-  flex-grow: 10; // high number to force alignment
 
   .nav-link {
     display: block;