ClearCase: Modernize

* Use pragma once
* Use static member initialization

Change-Id: Icec025b7c3b310286c675cef30cf01e220002ca8
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/clearcase/clearcasesettings.cpp

@@ -60,15 +60,7 @@ using namespace ClearCase::Internal;
 
 ClearCaseSettings::ClearCaseSettings() :
     ccCommand(defaultCommand()),
-    diffType(GraphicalDiff),
     diffArgs(QLatin1String(defaultDiffArgs)),
-    autoAssignActivityName(true),
-    autoCheckOut(true),
-    noComment(false),
-    keepFileUndoCheckout(true),
-    promptToCheckIn(false),
-    disableIndexer(false),
-    extDiffAvailable(false),
     historyCount(defaultHistoryCount),
     timeOutS(defaultTimeOutS)
 { }