Restore back buttons

fixes #4654
fixes #4653
fixes #4656

src/panels/config/dashboard/ha-config-dashboard.ts

@@ -110,7 +110,7 @@ class HaConfigDashboard extends LitElement {
         app-header {
           --app-header-background-color: var(--primary-background-color);
         }
-        ha-config-navigation:last-child {
+        ha-card:last-child {
           margin-bottom: 24px;
         }
         ha-config-section {

src/panels/config/zha/zha-config-dashboard.ts

@@ -102,10 +102,7 @@ class ZHAConfigDashboard extends LitElement {
 
   protected render(): TemplateResult {
     return html`
-      <hass-subpage
-        .header=${this.hass.localize("ui.panel.config.zha.title")}
-        .showBackButton=${!this.isWide}
-      >
+      <hass-subpage .header=${this.hass.localize("ui.panel.config.zha.title")}>
         <ha-config-section .narrow=${this.narrow} .isWide=${this.isWide}>
           <div slot="header">
             ${this.hass.localize("ui.panel.config.zha.header")}

src/panels/config/zwave/ha-config-zwave.js

@@ -80,10 +80,6 @@ class HaConfigZwave extends LocalizeMixin(EventsMixin(PolymerElement)) {
           display: none;
         }
 
-        ha-paper-icon-button-arrow-prev[hide] {
-          visibility: hidden;
-        }
-
         .toggle-help-icon {
           position: absolute;
           top: -6px;
@@ -95,7 +91,6 @@ class HaConfigZwave extends LocalizeMixin(EventsMixin(PolymerElement)) {
         <app-header slot="header" fixed="">
           <app-toolbar>
             <ha-paper-icon-button-arrow-prev
-              hide$="[[isWide]]"
               on-click="_backTapped"
             ></ha-paper-icon-button-arrow-prev>
             <div main-title="">