Fix formatting errors reported by stylelint.

sass/app.scss

@@ -1,8 +1,8 @@
-#main-content {
+.main-content {
     margin-left: 250px;
 }
 
-#sidebar-menu {
+.sidebar-menu {
     background-color: #f5f5f5;
     border-right: 1px solid #ccc;
     position: fixed;
@@ -24,7 +24,7 @@ ul {
 
 .sidebar {
     &__level-1 {
-        padding: .5rem 1rem;
+        padding: 0.5rem 1rem;
         font-size: 2rem;
         line-height: 3rem;
 
@@ -41,7 +41,7 @@ ul {
             margin-right: 1rem;
             font-size: 1.5rem;
             position: relative;
-            top: .5rem;
+            top: 0.5rem;
             display: none;
         }
 
@@ -121,11 +121,11 @@ ul {
     &__abbrev {
         border: none;
         border-bottom: 2px dotted #999;
-        padding: 0 .5rem;
-        margin: 0 .25rem;
+        padding: 0 0.5rem;
+        margin: 0 0.25rem;
 
         &.active {
-            box-shadow: 0 0 0px 1px #ccc, 0 0 5px 0px #ccc;
+            box-shadow: 0 0 0 1px #ccc, 0 0 5px 0 #ccc;
             border-color: transparent;
         }
     }
@@ -160,7 +160,7 @@ ul {
                 bottom: -0.3em;
                 right: 100%;
                 font-size: 2.4rem;
-                padding-right: .25em;
+                padding-right: 0.25em;
                 margin: 0;
             }
         }
@@ -193,8 +193,8 @@ ul {
 
 .key-editor__popup {
     border: none;
-    width: 0px;
-    height: 0px;
+    width: 0;
+    height: 0;
 
     // Static setting for quick portotyping.
     position: absolute;

sass/macro.scss

@@ -29,7 +29,7 @@ h1 {
     position: absolute;
     display: block;
     height: 13px;
-    background: #FFF;
+    background: #fff;
     width: 100%;
     left: 0;
     top: -14px;
@@ -37,7 +37,7 @@ h1 {
 
 .action--item.active.callout,
 .macro-settings.callout {
-    box-shadow: 0px 0px 20px 0px rgba(0, 0, 0, 0.5);
+    box-shadow: 0 0 20px 0 rgba(0, 0, 0, 0.5);
 }
 
 .list-group-item .move-handle:hover {
@@ -65,7 +65,7 @@ h1 {
 
 .action--edit__form {
     background-color: whtie;
-    margin-left: -.5rem;
+    margin-left: -0.5rem;
     margin-right: -15px;
     margin-top: 15px;
     padding-top: 15px;

sass/style.scss

@@ -18,20 +18,18 @@
 
 .popover-title {
     &.menu-tabs {
-        padding: .5rem .5rem 0;
+        padding: 0.5rem 0.5rem 0;
         display: block;
-    }
 
-    &.menu-button-group {
-        display: none;
-    }
-
-    &.menu-tabs {
         .nav-tabs {
             position: relative;
             top: 1px;
         }
     }
+
+    &.menu-button-group {
+        display: none;
+    }
 }
 
 .popover-actions {
@@ -55,11 +53,11 @@
 
 .layout-abbreviation {
     font-weight: bold;
-    color: #FFF;
+    color: #fff;
     background: #333;
     padding: 4px 8px;
     font-family: monospace;
-    margin-right: .5em;
+    margin-right: 0.5em;
 }
 
 .layout-preview img {
@@ -181,7 +179,7 @@
 .help-text {
     &--mouse-speed {
         margin-bottom: 2rem;
-        font-size: .9em;
+        font-size: 0.9em;
         color: #666;
 
         p {