Add toggle for background image and sync checkbox with config on load

Author: Sunnyl75

src/preferences/graphicspage.cpp

@@ -81,6 +81,10 @@ GraphicsPage::GraphicsPage(QWidget *parent)
             &QCheckBox::stateChanged,
             this,
             &GraphicsPage::slot_drawUpperLayersTexturedStateChanged);
+    connect(ui->backgroundImageCheckBox, &QCheckBox::toggled,
+            [](bool checked) {
+                setConfig().canvas.showBackgroundImage.set(checked);
+            });
 
     connect(ui->resourceLineEdit, &QLineEdit::textChanged, this, [](const QString &text) {
         setConfig().canvas.resourcesDirectory = text;
@@ -133,6 +137,8 @@ void GraphicsPage::slot_loadConfig()
     ui->drawDoorNames->setChecked(settings.drawDoorNames);
 
     ui->resourceLineEdit->setText(settings.resourcesDirectory);
+
+    ui->backgroundImageCheckBox->setChecked(getConfig().canvas.showBackgroundImage.get());
 }
 
 void GraphicsPage::changeColorClicked(XNamedColor &namedColor, QPushButton *const pushButton)

src/preferences/graphicspage.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>445</width>
-    <height>507</height>
+    <height>568</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -327,6 +327,22 @@
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox_Background">
+     <property name="title">
+      <string>Map Background</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_Background">
+      <item>
+       <widget class="QCheckBox" name="backgroundImageCheckBox">
+        <property name="text">
+         <string>Show Background Image</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
    <item>
     <widget class="QGroupBox" name="groupBox_Advanced">
      <property name="title">