WindowServer+DisplaySettings: Remove the weird "simple" wallpaper mode

Painting the wallpaper at 100% scale in the top left corner is a weird
mode and I don't think we need it. :^)

Userland/Applications/DisplaySettings/BackgroundSettingsWidget.cpp

@@ -26,7 +26,6 @@ namespace DisplaySettings {
 
 BackgroundSettingsWidget::BackgroundSettingsWidget()
 {
-    m_modes.append("simple");
     m_modes.append("tile");
     m_modes.append("center");
     m_modes.append("stretch");
@@ -96,10 +95,10 @@ void BackgroundSettingsWidget::load_current_settings()
         m_monitor_widget->set_wallpaper(selected_wallpaper);
     }
 
-    auto mode = ws_config->read_entry("Background", "Mode", "simple");
+    auto mode = ws_config->read_entry("Background", "Mode", "center");
     if (!m_modes.contains_slow(mode)) {
-        warnln("Invalid background mode '{}' in WindowServer config, falling back to 'simple'", mode);
-        mode = "simple";
+        warnln("Invalid background mode '{}' in WindowServer config, falling back to 'center'", mode);
+        mode = "center";
     }
     m_monitor_widget->set_wallpaper_mode(mode);
     m_mode_combo->set_selected_index(m_modes.find_first_index(mode).value_or(0));

Userland/Applications/DisplaySettings/MonitorWidget.cpp

@@ -104,9 +104,7 @@ void MonitorWidget::redraw_desktop_if_needed()
     auto scaled_size = m_wallpaper_bitmap->size().to_type<float>().scaled_by(sw, sh).to_type<int>();
     auto scaled_bitmap = m_wallpaper_bitmap->scaled(sw, sh);
 
-    if (m_desktop_wallpaper_mode == "simple") {
-        painter.blit({}, *scaled_bitmap, scaled_bitmap->rect());
-    } else if (m_desktop_wallpaper_mode == "center") {
+    if (m_desktop_wallpaper_mode == "center") {
         Gfx::IntRect centered_rect { {}, scaled_size };
         centered_rect.center_within(m_desktop_bitmap->rect());
         painter.blit(centered_rect.location(), *scaled_bitmap, scaled_bitmap->rect());

Userland/Services/WindowServer/Compositor.cpp

@@ -30,15 +30,13 @@ Compositor& Compositor::the()
 
 static WallpaperMode mode_to_enum(const String& name)
 {
-    if (name == "simple")
-        return WallpaperMode::Simple;
     if (name == "tile")
         return WallpaperMode::Tile;
-    if (name == "center")
-        return WallpaperMode::Center;
     if (name == "stretch")
         return WallpaperMode::Stretch;
-    return WallpaperMode::Simple;
+    if (name == "center")
+        return WallpaperMode::Center;
+    return WallpaperMode::Center;
 }
 
 Compositor::Compositor()
@@ -92,7 +90,7 @@ void Compositor::init_bitmaps()
 void Compositor::did_construct_window_manager(Badge<WindowManager>)
 {
     auto& wm = WindowManager::the();
-    m_wallpaper_mode = mode_to_enum(wm.config()->read_entry("Background", "Mode", "simple"));
+    m_wallpaper_mode = mode_to_enum(wm.config()->read_entry("Background", "Mode", "center"));
     m_custom_background_color = Color::from_string(wm.config()->read_entry("Background", "Color", ""));
 
     invalidate_screen();
@@ -226,9 +224,7 @@ void Compositor::compose()
         // FIXME: If the wallpaper is opaque and covers the whole rect, no need to fill with color!
         painter.fill_rect(rect, background_color);
         if (m_wallpaper) {
-            if (m_wallpaper_mode == WallpaperMode::Simple) {
-                painter.blit(rect.location(), *m_wallpaper, rect);
-            } else if (m_wallpaper_mode == WallpaperMode::Center) {
+            if (m_wallpaper_mode == WallpaperMode::Center) {
                 Gfx::IntPoint offset { (ws.width() - m_wallpaper->width()) / 2, (ws.height() - m_wallpaper->height()) / 2 };
                 painter.blit_offset(rect.location(), *m_wallpaper, rect, offset);
             } else if (m_wallpaper_mode == WallpaperMode::Tile) {

Userland/Services/WindowServer/Compositor.h

@@ -20,7 +20,6 @@ class Window;
 class WindowManager;
 
 enum class WallpaperMode {
-    Simple,
     Tile,
     Center,
     Stretch,