Fix search label when on the main page

"Search on 'Home'" reads really weird

discover/qml/BrowsingPage.qml

@@ -36,6 +36,8 @@ DiscoverPage
     topPadding: 0
     bottomPadding: 0
 
+    readonly property bool isHome: true
+
     function searchFor(text) {
         if (text.length === 0)
             return;

discover/qml/SearchField.qml

@@ -29,7 +29,7 @@ TextField
     property QtObject page
     property string currentSearchText
 
-    placeholderText: (!enabled || !page || page.title.length === 0) ? i18n("Search...") : i18n("Search in '%1'...", window.leftPage.title)
+    placeholderText: (!enabled || !page || page.hasOwnProperty("isHome") || page.title.length === 0) ? i18n("Search...") : i18n("Search in '%1'...", window.leftPage.title)
 
     Shortcut {
         sequence: "Ctrl+F"