Replace usage of QRegularExpression::anchoredPattern with `^` and `$`

Using `^` and `$` is shorter than `QRegularExpression::anchoredPattern`,
and even allows us in one case to get rid of a trailing `.*`.

apps/launcher/graphicspage.cpp

@@ -205,7 +205,7 @@ void Launcher::GraphicsPage::saveSettings()
     int cHeight = 0;
     if (standardRadioButton->isChecked())
     {
-        QRegularExpression resolutionRe(QRegularExpression::anchoredPattern(QString("(\\d+) x (\\d+).*")));
+        QRegularExpression resolutionRe("^(\\d+) x (\\d+)");
         QRegularExpressionMatch match = resolutionRe.match(resolutionComboBox->currentText().simplified());
         if (match.hasMatch())
         {

apps/launcher/utils/textinputdialog.cpp

@@ -20,8 +20,7 @@ Launcher::TextInputDialog::TextInputDialog(const QString& title, const QString&
     label->setText(text);
 
     // Line edit
-    QValidator* validator
-        = new QRegularExpressionValidator(QRegularExpression("^[a-zA-Z0-9_]*$"), this); // Alpha-numeric + underscore
+    QValidator* validator = new QRegularExpressionValidator(QRegularExpression("^[a-zA-Z0-9_]*$"), this);
     mLineEdit = new LineEdit(this);
     mLineEdit->setValidator(validator);
     mLineEdit->setCompleter(nullptr);

apps/wizard/inisettings.cpp

@@ -30,7 +30,7 @@ bool Wizard::IniSettings::readFile(QTextStream& stream)
     // Look for a square bracket, "'\\["
     // that has one or more "not nothing" in it, "([^]]+)"
     // and is closed with a square bracket, "\\]"
-    QRegularExpression sectionRe(QRegularExpression::anchoredPattern("^\\[([^]]+)\\]"));
+    QRegularExpression sectionRe("^\\[([^]]+)\\]$");
 
     // Find any character(s) that is/are not equal sign(s), "[^=]+"
     // followed by an optional whitespace, an equal sign, and another optional whitespace, "\\s*=\\s*"
@@ -75,7 +75,7 @@ bool Wizard::IniSettings::writeFile(const QString& path, QTextStream& stream)
     // Look for a square bracket, "'\\["
     // that has one or more "not nothing" in it, "([^]]+)"
     // and is closed with a square bracket, "\\]"
-    QRegularExpression sectionRe(QRegularExpression::anchoredPattern("^\\[([^]]+)\\]"));
+    QRegularExpression sectionRe("^\\[([^]]+)\\]$");
 
     // Find any character(s) that is/are not equal sign(s), "[^=]+"
     // followed by an optional whitespace, an equal sign, and another optional whitespace, "\\s*=\\s*"

components/config/launchersettings.cpp

@@ -47,7 +47,7 @@ QStringList Config::LauncherSettings::subKeys(const QString& key)
 bool Config::LauncherSettings::writeFile(QTextStream& stream)
 {
     QString sectionPrefix;
-    QRegularExpression sectionRe(QRegularExpression::anchoredPattern("([^/]+)/(.+)$"));
+    QRegularExpression sectionRe("^([^/]+)/(.+)$");
     QMultiMap<QString, QString> settings = SettingsBase::getSettings();
 
     QMapIterator<QString, QString> i(settings);

components/config/settingsbase.hpp

@@ -42,7 +42,7 @@ namespace Config
 
             QString sectionPrefix;
 
-            QRegularExpression sectionRe(QRegularExpression::anchoredPattern("^\\[([^]]+)\\]"));
+            QRegularExpression sectionRe("^\\[([^]]+)\\]$");
             QRegularExpression keyRe("^([^=]+)\\s*=\\s*(.+)$");
 
             while (!stream.atEnd())