Fix issue where textfield used wrong signals

qml/components/GitCloneHttp.qml

@@ -30,7 +30,7 @@ Column {
         verticalAlignment: Text.AlignVCenter
         width: parent.width
         placeholderText: "http(s)://<hostname>"
-        onContentWidthChanged: repoUrlChanged(repoUrlInput.text)
+        onTextChanged: repoUrlChanged(repoUrlInput.text)
     }
 
     Rectangle {

qml/components/GitCloneHttpAuth.qml

@@ -30,7 +30,7 @@ Column {
         verticalAlignment: Text.AlignVCenter
         width: parent.width
         placeholderText: "http(s)://<username>@<hostname>"
-        onContentWidthChanged: repoUrlChanged(repoUrlInput.text)
+        onTextChanged: repoUrlChanged(repoUrlInput.text)
     }
 
     Text {

qml/pages/headers/MainHeader.qml

@@ -64,7 +64,7 @@ PageHeader {
             height: units.gu(4)
             visible: false
             anchors.verticalCenter: parent.verticalCenter
-            onContentWidthChanged: searchBarTextChanged(searchBar.text)
+            onTextChanged: searchBarTextChanged(searchBar.text)
         }
 
     }