Use Utils::SkipEmptyParts instead of the deprecated one in QString

- Qt 5.14 introduced Qt::Keep/SkipEmptyParts and deprecated these in
QString namespace.
- Qt Creator defined Utils::SkipEmptyParts conditional on the Qt version,
so we use that for flexibility.
- Remove any explicit references to QString::KeepEmptyParts, as it's a
default value.

Change-Id: I72c65e4901ebc4c5422d4835e63fe23fb6ef28ff
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

plugins/fossil/fossilplugin.cpp

@@ -57,6 +57,7 @@
 
 #include <utils/parameteraction.h>
 #include <utils/qtcassert.h>
+#include <utils/stringutils.h>
 
 #include <vcsbase/basevcseditorfactory.h>
 #include <vcsbase/basevcssubmiteditorfactory.h>
@@ -834,7 +835,7 @@ bool FossilPluginPrivate::submitEditorAboutToClose()
         //rewrite entries of the form 'file => newfile' to 'newfile' because
         //this would mess the commit command
         for (QStringList::iterator iFile = files.begin(); iFile != files.end(); ++iFile) {
-            const QStringList parts = iFile->split(" => ", QString::SkipEmptyParts);
+            const QStringList parts = iFile->split(" => ", Utils::SkipEmptyParts);
             if (!parts.isEmpty())
                 *iFile = parts.last();
         }