Platform: added view-taking Platform::GlfwApplication::setWindowIcon().

For some reason there's just an initializer-list overload, which is
rather useless.

doc/changelog.dox

@@ -115,6 +115,11 @@ See also:
 -   @ref magnum-sceneconverter "magnum-sceneconverter" now lists also materials
     and textures in `--info`
 
+@subsubsection changelog-latest-changes-platform Platform libraries
+
+-   Added a @ref Platform::GlfwApplication::setWindowIcon() overload taking a
+    @ref Corrade::Containers::ArrayView in addition to @ref std::initializer_list
+
 @subsubsection changelog-latest-changes-shaders Shaders library
 
 -   In the original implementation of normal mapping in @ref Shaders::Phong,

src/Magnum/Platform/GlfwApplication.cpp

@@ -248,7 +248,7 @@ void GlfwApplication::setWindowTitle(const std::string& title) {
 
 #if GLFW_VERSION_MAJOR*100 + GLFW_VERSION_MINOR >= 302
 void GlfwApplication::setWindowIcon(const ImageView2D& image) {
-    setWindowIcon({image});
+    setWindowIcon({&image, 1});
 }
 
 namespace {
@@ -261,7 +261,7 @@ template<class T> inline void packPixels(const Containers::StridedArrayView2D<co
 
 }
 
-void GlfwApplication::setWindowIcon(std::initializer_list<ImageView2D> images) {
+void GlfwApplication::setWindowIcon(const Containers::ArrayView<const ImageView2D> images) {
     /* Calculate the total size needed to allocate first so we don't allocate
        a ton of tiny arrays */
     std::size_t size = 0;
@@ -302,6 +302,10 @@ void GlfwApplication::setWindowIcon(std::initializer_list<ImageView2D> images) {
 
     glfwSetWindowIcon(_window, glfwImages.size(), glfwImages);
 }
+
+void GlfwApplication::setWindowIcon(std::initializer_list<ImageView2D> images) {
+    setWindowIcon(Containers::arrayView(images));
+}
 #endif
 
 bool GlfwApplication::tryCreate(const Configuration& configuration) {

src/Magnum/Platform/GlfwApplication.h

@@ -470,7 +470,7 @@ class GlfwApplication {
         #if GLFW_VERSION_MAJOR*100 + GLFW_VERSION_MINOR >= 302 || defined(DOXYGEN_GENERATING_OUTPUT)
         /**
          * @brief Set window icon
-         * @m_since{2020,06}
+         * @m_since_latest
          *
          * The @p images are expected to be with origin at bottom left (which
          * is the default for imported images) and in one of
@@ -484,6 +484,12 @@ class GlfwApplication {
          * @see @ref platform-windows-icon "Excecutable icon on Windows",
          *      @ref Trade::IcoImporter "IcoImporter"
          */
+        void setWindowIcon(Containers::ArrayView<const ImageView2D> images);
+
+        /**
+         * @overload
+         * @m_since{2020,06}
+         */
         void setWindowIcon(std::initializer_list<ImageView2D> images);
 
         /**