Hide some diff editor controls when diff editor is bound to a file.

Remove unnecessary anymore "ignoreWhitespace" argument
from functions which read a patch file.

Transfer the ownership of reloader into controller.

Task-number: QTCREATORBUG-13250
Change-Id: I68183005b845d6ece9ea2be9888abc8597310426
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/plugins/diffeditor/diffutils.h

@@ -148,7 +148,6 @@ public:
                              bool lastChunk = false);
     static QString makePatch(const QList<FileData> &fileDataList);
     static QList<FileData> readPatch(const QString &patch,
-                                     bool ignoreWhitespace,
                                      bool *ok = 0);
 };