PatchTool: Introduce PatchAction enum

Add static PatchTool::confirmPatching() and reuse it
in two places.

Use Tr::tr() inside PatchTool.

Change-Id: I70779619dbb58ab6e46a585bbeff51588ccb2f53
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/diffeditor/diffeditorcontroller.cpp

@@ -13,6 +13,7 @@
 
 #include <QStringList>
 
+using namespace Core;
 using namespace Utils;
 
 namespace DiffEditor {
@@ -55,7 +56,8 @@ QString DiffEditorController::makePatch(int fileIndex, int chunkIndex,
                                         PatchOptions options) const
 {
     return m_document->makePatch(fileIndex, chunkIndex, selection,
-                                 options & Revert, options & AddPrefix);
+                                 (options & Revert) ? PatchAction::Revert : PatchAction::Apply,
+                                 options & AddPrefix);
 }
 
 Core::IDocument *DiffEditorController::findOrCreateDocument(const QString &vcsId,