Add name to threads

This help identifying threads when debugging.
The naming scheme is using 'class/function name + variable name'.
Note that the length limitaion is 16 chars on linux. On Windows, the limit is 32767 chars.

PR #21403.

src/gui/properties/propertieswidget.cpp

@@ -39,7 +39,6 @@
 #include <QSplitter>
 #include <QShortcut>
 #include <QStackedWidget>
-#include <QThread>
 #include <QUrl>
 
 #include "base/bittorrent/infohash.h"

src/gui/torrentcontentwidget.cpp

@@ -37,7 +37,6 @@
 #include <QMessageBox>
 #include <QModelIndexList>
 #include <QShortcut>
-#include <QThread>
 #include <QWheelEvent>
 
 #include "base/bittorrent/torrentcontenthandler.h"

src/gui/torrentcreatordialog.cpp

@@ -109,6 +109,7 @@ TorrentCreatorDialog::TorrentCreatorDialog(QWidget *parent, const Path &defaultP
     updateInputPath(defaultPath);
 
     m_threadPool.setMaxThreadCount(1);
+    m_threadPool.setObjectName("TorrentCreatorDialog m_threadPool");
 
 #ifdef QBT_USES_LIBTORRENT2
     m_ui->checkOptimizeAlignment->hide();

src/gui/uithemedialog.cpp

@@ -75,7 +75,7 @@ public:
         , m_defaultColor {defaultColor}
         , m_currentColor {currentColor}
     {
-        setObjectName(u"colorWidget"_s);
+        setObjectName("colorWidget");
         setFrameShape(QFrame::Box);
         setFrameShadow(QFrame::Plain);
         setAlignment(Qt::AlignCenter);
@@ -159,7 +159,7 @@ public:
         : QLabel(parent)
         , m_defaultPath {defaultPath}
     {
-        setObjectName(u"iconWidget"_s);
+        setObjectName("iconWidget");
         setAlignment(Qt::AlignCenter);
 
         setCurrentPath(currentPath);

src/gui/utils.cpp

@@ -134,6 +134,7 @@ void Utils::Gui::openPath(const Path &path)
             ::CoUninitialize();
         }
     });
+    thread->setObjectName("Utils::Gui::openPath thread");
     QObject::connect(thread, &QThread::finished, thread, &QObject::deleteLater);
     thread->start();
 #else
@@ -168,6 +169,7 @@ void Utils::Gui::openFolderSelect(const Path &path)
             ::CoUninitialize();
         }
     });
+    thread->setObjectName("Utils::Gui::openFolderSelect thread");
     QObject::connect(thread, &QThread::finished, thread, &QObject::deleteLater);
     thread->start();
 #elif defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)