Added preferences for split views and tabs unloader

src/browser/app/profile/zen-browser.js

@@ -119,6 +119,7 @@ pref('zen.sidebar.close-on-blur', true);
 // Zen Split View
 pref('zen.splitView.working', false);
 pref('zen.splitView.min-resize-width', 7);
+pref('zen.splitView.change-on-hover', false);
 
 // Zen Workspaces
 pref('zen.workspaces.enabled', true);

src/browser/components/preferences/zen-settings.js

@@ -954,4 +954,14 @@ Preferences.addAll([
     type: 'bool',
     default: true,
   },
+  {
+    id: 'zen.view.split-view.change-on-hover',
+    type: 'bool',
+    default: true,
+  },
+  {
+    id: 'zen.tab-unloader.timeout-minutes',
+    type: 'int',
+    default: 10,
+  }
 ]);

src/browser/components/preferences/zenLooksAndFeel.inc.xhtml

@@ -255,6 +255,22 @@
       </hbox>
 </groupbox>
 
+<hbox id="zenSplitViewCategory"
+      class="subcategory"
+      hidden="true"
+      data-category="paneZenLooks">
+<html:h1 data-l10n-id="zen-split-view-title"/>
+</hbox>
+
+<groupbox id="zenSplitViewGroup" data-category="paneZenLooks" hidden="true" class="highlighting-group">
+      <label><html:h2 data-l10n-id="zen-split-view-header"/></label>
+      <description class="description-deemphasized" data-l10n-id="zen-split-view-description" />
+
+      <checkbox id="zenLooksAndFeelSplitViewChangeOnHover"
+            data-l10n-id="zen-split-view-change-on-hover"
+            preference="zen.view.split-view.change-on-hover"/>
+</groupbox>
+
 <hbox id="zenVerticalTabsCategory"
       class="subcategory"
       hidden="true"

src/browser/components/preferences/zenTabsManagement.inc.xhtml

@@ -49,8 +49,14 @@
             preference="zen.tab-unloader.enabled"/>
 
       <label><html:h2 data-l10n-id="zen-tabs-unloader-unload-delay"/></label>
-      <description class="description-deemphasized" data-l10n-id="zen-tabs-unloader-unload-delay-description" />
+      <hbox id="zenTabsUnloadDelayContainer">
-      <!-- TODO: Input type should be number -->
+            <description class="description-deemphasized" data-l10n-id="zen-tabs-unloader-unload-delay-description" />
+            <html:input id="zenTabsUnloadDelay"
+                  type="number"
+                  min="1"
+                  max="1000"
+                  preference="zen.tab-unloader.timeout-minutes"/>
+      </hbox>
 </groupbox>
 
 </html:template>

src/browser/themes/shared/preferences/zen-preferences.css

@@ -309,6 +309,15 @@ groupbox h2 {
   list-style-image: url('chrome://browser/skin/window.svg');
 }
 
+#zenTabsUnloadDelayContainer {
+  display: flex;
+  align-items: center;
+
+  & #zenTabsUnloadDelay {
+    margin-left: auto;
+  }
+}
+
 /* CKS */
 
 #category-zen-CKS > .category-icon {