Replace all remaining functions deprecated in Qt 5, if possible.

These are:
    - QInputDialog::getInteger() [-> getInt()]
    - QKeySequence::operator QString() [-> toString()]
    - QRegion::intersect() [-> intersected()]
    - qVariantCanConvert() [-> QVariant::canConvert()]

Plus some left-over occurrences of qFindChild() and
QAbstractItemModel::reset() that were missed by the
respective earlier patches.

All deprecated features still left are not trivially
replaceable, i.e. the code using them cannot be made
to compile with both Qt 4 and Qt 5.

Change-Id: I32541681bbf66b0fef78f5c7025521f9ff84f463
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/git/remotemodel.cpp

@@ -186,8 +186,9 @@ void RemoteModel::clear()
 {
     if (m_remotes.isEmpty())
         return;
+    beginResetModel();
     m_remotes.clear();
-    reset();
+    endResetModel();
 }
 
 bool RemoteModel::refresh(const QString &workingDirectory, QString *errorMessage)
@@ -200,6 +201,7 @@ bool RemoteModel::refresh(const QString &workingDirectory, QString *errorMessage
         return false;
     // Parse output
     m_workingDirectory = workingDirectory;
+    beginResetModel();
     m_remotes.clear();
     const QStringList lines = output.split(QLatin1Char('\n'));
     for (int r = 0; r < lines.count(); ++r) {
@@ -207,7 +209,7 @@ bool RemoteModel::refresh(const QString &workingDirectory, QString *errorMessage
         if (newRemote.parse(lines.at(r)))
             m_remotes.push_back(newRemote);
     }
-    reset();
+    endResetModel();
     return true;
 }