fix(item-divider): fabs have higher z-index than item-dividers

fixes #8489

Author: manucorporat

src/components/item/item.scss

@@ -76,7 +76,7 @@ ion-item-group {
 }
 
 ion-item-divider {
-  z-index: 1000;
+  z-index: $z-index-item-divider;
   display: flex;
   overflow: hidden;
 

src/components/list/test/header-scenarios/main.html

@@ -5,6 +5,16 @@
 </ion-header>
 
 <ion-content class="outer-content">
+
+  <div>
+    <ion-fab top right>
+      <button ion-fab><ion-icon name="add"></ion-icon></button>
+    </ion-fab>
+  </div>
+  <ion-fab bottom right>
+    <button ion-fab><ion-icon name="close"></ion-icon></button>
+  </ion-fab>
+
   <ion-list>
     <!--<ion-list-header>
       ion-list-header

src/components/list/test/headers/main.html

@@ -9,6 +9,15 @@
 
 <ion-content class="outer-content">
 
+  <div>
+    <ion-fab top right>
+      <button ion-fab><ion-icon name="add"></ion-icon></button>
+    </ion-fab>
+  </div>
+  <ion-fab bottom right>
+    <button ion-fab><ion-icon name="close"></ion-icon></button>
+  </ion-fab>
+
   <ion-list>
 
     <ion-list-header>

src/components/list/test/inset/main.html

@@ -9,6 +9,15 @@
 
 <ion-content class="outer-content">
 
+  <div>
+    <ion-fab top right>
+      <button ion-fab><ion-icon name="add"></ion-icon></button>
+    </ion-fab>
+  </div>
+  <ion-fab bottom right>
+    <button ion-fab><ion-icon name="close"></ion-icon></button>
+  </ion-fab>
+
   <ion-list inset>
 
     <ion-list-header>

src/components/list/test/sticky/main.html

@@ -1,4 +1,14 @@
 <ion-content>
+
+  <div>
+    <ion-fab top right>
+      <button ion-fab><ion-icon name="add"></ion-icon></button>
+    </ion-fab>
+  </div>
+  <ion-fab bottom right>
+    <button ion-fab><ion-icon name="close"></ion-icon></button>
+  </ion-fab>
+
   <ion-list>
     <ion-item-group *ngFor="let group of groups">
       <ion-item-divider sticky>{{group.title}}</ion-item-divider>

src/themes/ionic.globals.scss

@@ -32,7 +32,7 @@ $z-index-menu-backdrop:          79;
 $z-index-overlay:                1000;
 $z-index-click-block:            9999;
 
-$z-index-fixed-content:          100;
+$z-index-fixed-content:          999;
 $z-index-scroll-content:         1;
 $z-index-refresher:              0;
 
@@ -44,3 +44,4 @@ $z-index-backdrop:               2;
 $z-index-overlay-wrapper:        10;
 
 $z-index-item-options:           1;
+$z-index-item-divider:          100;