ProjectExplorer: Remove BuildTargetInfo::displayName

This was previously intented to be used in the RunConfig Add... menu,
but this role is now taken by RunConfigurationCreationInfo::displayName.

This fixes also a regression for setups that relied on
QmakeProject::buildTargets() and a fix up empty display names later.

Change-Id: If75fc79efbdedc918a126e50c962fc188d7a3ebc
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/buildtargetinfo.h

@@ -48,7 +48,6 @@ public:
 
     QString targetName;
 
-    QString displayName; // Used in "RunConfiguration Add ..." drop down.
     Utils::FileName targetFilePath;
     Utils::FileName projectFilePath;
 

src/plugins/projectexplorer/runconfiguration.cpp

@@ -453,7 +453,8 @@ IRunConfigurationFactory::availableCreators(Target *parent, IRunConfigurationFac
 {
     Q_UNUSED(mode);
     return Utils::transform(parent->applicationTargets().list, [this](const BuildTargetInfo &ti) {
-        return RunConfigurationCreationInfo(this, m_runConfigBaseId, ti.targetName, ti.displayName);
+        return RunConfigurationCreationInfo(this, m_runConfigBaseId, ti.targetName,
+                                            QFileInfo(ti.targetName).completeBaseName());
     });
 }
 
@@ -476,7 +477,7 @@ void IRunConfigurationFactory::addSupportedProjectType(Core::Id id)
 RunConfigurationCreationInfo
 IRunConfigurationFactory::convert(const BuildTargetInfo &ti) const
 {
-    return convert(ti.displayName, ti.targetName);
+    return convert(QFileInfo(ti.targetName).completeBaseName(), ti.targetName);
 }
 
 RunConfigurationCreationInfo

src/plugins/qmakeprojectmanager/qmakeproject.cpp

@@ -803,7 +803,6 @@ QList<BuildTargetInfo> QmakeProject::buildTargets(IRunConfigurationFactory::Crea
     return Utils::transform(temp, [](QmakeProFile *f) {
         BuildTargetInfo bti;
         bti.targetName = f->filePath().toString();
-        bti.displayName = QFileInfo(bti.targetName).completeBaseName();
         return bti;
     });
 }

src/plugins/remotelinux/remotelinuxrunconfigurationfactory.cpp

@@ -33,6 +33,8 @@
 #include <projectexplorer/target.h>
 #include <utils/qtcassert.h>
 
+#include <QFileInfo>
+
 using namespace ProjectExplorer;
 
 namespace RemoteLinux {
@@ -58,8 +60,9 @@ QList<RunConfigurationCreationInfo>
 {
     Q_UNUSED(mode);
     return Utils::transform(parent->applicationTargets().list, [this](const BuildTargetInfo &bti) {
-        return convert(tr("%1 (on Remote Generic Linux Host)").arg(bti.displayName), bti.targetName);
+        return convert(tr("%1 (on Remote Generic Linux Host)").arg(bti.targetName),
-     });
+                       QFileInfo(bti.targetName).completeBaseName());
+    });
  }