Fix UserSettings UI not showing saved prefs

Theme and Font Family settings will now correctly display the stored
settings when nheko is re-launched.  Previously, these combo boxes
would default to the first thing in the combo box, even if that
wasn't what the user selected.

src/UserSettingsPage.cpp

@@ -239,6 +239,9 @@ UserSettingsPage::UserSettingsPage(QSharedPointer<UserSettings> settings, QWidge
                 fontSelectionCombo_->addItem(family);
         }
 
+        int fontIndex = fontSelectionCombo_->findText(settings_->font());
+        fontSelectionCombo_->setCurrentIndex(fontIndex);
+
         fontFamilyOptionLayout->addWidget(fontFamilyLabel);
         fontFamilyOptionLayout->addWidget(fontSelectionCombo_, 0, Qt::AlignRight);
 
@@ -251,6 +254,11 @@ UserSettingsPage::UserSettingsPage(QSharedPointer<UserSettings> settings, QWidge
         themeCombo_->addItem("Dark");
         themeCombo_->addItem("System");
 
+        QString themeStr = settings_->theme();
+        themeStr.replace(0, 1, themeStr[0].toUpper());
+        int themeIndex = themeCombo_->findText(themeStr);
+        themeCombo_->setCurrentIndex(themeIndex);
+
         themeOptionLayout_->addWidget(themeLabel_);
         themeOptionLayout_->addWidget(themeCombo_, 0, Qt::AlignRight);
 

src/UserSettingsPage.h

@@ -92,6 +92,7 @@ public:
         bool isReadReceiptsEnabled() const { return isReadReceiptsEnabled_; }
         bool hasDesktopNotifications() const { return hasDesktopNotifications_; }
         double fontSize() const { return baseFontSize_; }
+        QString font() const { return font_; }
 
 signals:
         void groupViewStateChanged(bool state);