User settings are case-sensitive (tiny performance edge in INIParser), this...

User settings are case-sensitive (tiny performance edge in INIParser), this was not matching the settings page. Clear a warning.

resources/settings_dialog.xml

@@ -46,13 +46,13 @@ For changes, note that the keys used here are hardcoded in INIshell also.
 			<o value="de" caption="Deutsch" help="German"/>
 			<help>Note that this only concerns the static part of INIshell and the applications' descriptions are up to the software's vendor to translate.</help>
 		</parameter>
-		<parameter key="user::appearance::remembersizes" caption="Remember window sizes" type="checkbox" default="true" help="Restore windows sizes">
+		<parameter key="user::appearance::remembersizes" caption="Remember window sizes" type="checkbox" default="TRUE" help="Restore windows sizes">
 			<help>Restore window sizes when they are re-opened.</help>
 		</parameter>
 		<parameter key="user::appearance::fontsize" label="Font size:" type="number" format="integer" min="1" unit="pt" default="12" notoggle="true" help="Default INIshell font size">
 			<help>Font size for the main INIshell text elements. Takes effect on next program restart.</help>
 		</parameter>
-		<parameter key="user::appearance::preview_mono_font" type="checkbox" caption="Set monospaced font in the Preview window" default="true">
+		<parameter key="user::appearance::preview_mono_font" type="checkbox" caption="Set monospaced font in the Preview window" default="TRUE">
 			<help>This is useful to keep the formatting of space-indented INI files.</help>
 		</parameter>
 		<parameter key="user::appearance::darkmode" label="Dark theme:" type="Alternative">
@@ -63,7 +63,7 @@ For changes, note that the keys used here are hardcoded in INIshell also.
 		</parameter>
 	</frame>
 	<frame caption="Warning messages" section="settings">
-		<parameter key="user::inireader::warn_unsaved_ini" caption="Warn on unsaved INI changes" type="checkbox" default="true">
+		<parameter key="user::inireader::warn_unsaved_ini" caption="Warn on unsaved INI changes" type="checkbox" default="TRUE">
 			<help>When closing an opened INI file, ask what to do with unsaved changes? If set to &lt;code&gt;false&lt;/code&gt;, unsaved changes will be discarded. This also sets the behavior for unsaved changes in the preview window.</help>
 		</parameter>
 	</frame>

src/gui/MainWindow.cc

@@ -520,10 +520,12 @@ void MainWindow::loadHelp(const QString &tab_name, const QString &frame_name)
 	if (tab_name.isEmpty())
 		return;
 
-	const bool success = control_panel_->showTab(tab_name);
 #ifdef DEBUG
+	const bool success = control_panel_->showTab(tab_name);
 	if (!success)
 		qDebug() << "Help section does not exist:" << tab_name;
+#else
+	(void) control_panel_->showTab(tab_name);
 #endif //def DEBUG
 
 	auto parent = control_panel_->getSectionScrollarea(tab_name);