Base+Userland: Add various icons

Add new icons to menus, add existing icons that could be used in menus.

Userland/Applications/Browser/BrowserWindow.cpp

@@ -197,7 +197,7 @@ void BrowserWindow::build_menus()
     });
 
     m_view_source_action = GUI::Action::create(
-        "View &Source", { Mod_Ctrl, Key_U }, [this](auto&) {
+        "View &Source", { Mod_Ctrl, Key_U }, Gfx::Bitmap::try_load_from_file("/res/icons/16x16/code.png").release_value_but_fixme_should_propagate_errors(), [this](auto&) {
             active_tab().m_web_content_view->get_source();
         },
         this);
@@ -211,7 +211,7 @@ void BrowserWindow::build_menus()
     m_inspect_dom_tree_action->set_status_tip("Open inspector window for this page");
 
     m_inspect_dom_node_action = GUI::Action::create(
-        "&Inspect Element", [this](auto&) {
+        "&Inspect Element", Gfx::Bitmap::try_load_from_file("/res/icons/16x16/inspect.png").release_value_but_fixme_should_propagate_errors(), [this](auto&) {
             active_tab().show_inspector_window(Tab::InspectorTarget::HoveredElement);
         },
         this);
@@ -222,7 +222,7 @@ void BrowserWindow::build_menus()
     inspect_menu.add_action(*m_inspect_dom_tree_action);
 
     auto js_console_action = GUI::Action::create(
-        "Open &JS Console", { Mod_Ctrl, Key_I }, [this](auto&) {
+        "Open &JS Console", { Mod_Ctrl, Key_I }, Gfx::Bitmap::try_load_from_file("/res/icons/16x16/filetype-javascript.png").release_value_but_fixme_should_propagate_errors(), [this](auto&) {
             active_tab().show_console_window();
         },
         this);

Userland/Applications/FileManager/main.cpp

@@ -970,7 +970,7 @@ ErrorOr<int> run_in_windowed_mode(String const& initial_location, String const&
     TRY(view_menu->try_add_separator());
     TRY(view_menu->try_add_action(action_show_dotfiles));
 
-    auto go_to_location_action = GUI::Action::create("Go to &Location...", { Mod_Ctrl, Key_L }, [&](auto&) {
+    auto go_to_location_action = GUI::Action::create("Go to &Location...", { Mod_Ctrl, Key_L }, Gfx::Bitmap::try_load_from_file("/res/icons/16x16/go-to.png").release_value_but_fixme_should_propagate_errors(), [&](auto&) {
         toolbar_container.set_visible(true);
         location_toolbar.set_visible(true);
         breadcrumb_toolbar.set_visible(false);

Userland/Applications/ImageViewer/main.cpp

@@ -157,17 +157,17 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         widget->rotate(Gfx::RotationDirection::Clockwise);
     });
 
-    auto vertical_flip_action = GUI::Action::create("Flip &Vertically", { Mod_None, Key_V },
+    auto vertical_flip_action = GUI::Action::create("Flip &Vertically", { Mod_None, Key_V }, TRY(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/edit-flip-vertical.png")),
         [&](auto&) {
             widget->flip(Gfx::Orientation::Vertical);
         });
 
-    auto horizontal_flip_action = GUI::Action::create("Flip &Horizontally", { Mod_None, Key_H },
+    auto horizontal_flip_action = GUI::Action::create("Flip &Horizontally", { Mod_None, Key_H }, TRY(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/edit-flip-horizontal.png")),
         [&](auto&) {
             widget->flip(Gfx::Orientation::Horizontal);
         });
 
-    auto desktop_wallpaper_action = GUI::Action::create("Set as Desktop &Wallpaper",
+    auto desktop_wallpaper_action = GUI::Action::create("Set as Desktop &Wallpaper", TRY(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/app-display-settings.png")),
         [&](auto&) {
             auto could_set_wallpaper = GUI::Desktop::the().set_wallpaper(widget->path());
             if (!could_set_wallpaper) {