C++ apps: templated scene controller (#517)

* C++ apps: templated scene controller
* templated app: fix type names
* templated app: text store component
* Applications: add "Templated Scene" application
* templated app: refractoring
* Gui module byte input: fix docs
* templated app: new byte input scene
* templated app: dialog ex view module
* templated app: popup view module
* templated app: dialog-ex view module, fix docs
* templated app: text input view module
* Gui module text input: fix docs
* Furi: duplicated include
* templated app: record holder (controller) class
* templated app: view modules can now be accessed via cast
* templated app: remove unused includes
* templated app: fix return code

lib/app-scened-template/view-modules/submenu-vm.cpp

@@ -0,0 +1,33 @@
+#include "submenu-vm.h"
+
+SubmenuVM::SubmenuVM() {
+    submenu = submenu_alloc();
+}
+
+SubmenuVM::~SubmenuVM() {
+    submenu_free(submenu);
+}
+
+View* SubmenuVM::get_view() {
+    return submenu_get_view(submenu);
+}
+
+void SubmenuVM::clean() {
+    submenu_clean(submenu);
+}
+
+SubmenuItem* SubmenuVM::add_item(
+    const char* label,
+    uint32_t index,
+    SubmenuItemCallback callback,
+    void* callback_context) {
+    return submenu_add_item(submenu, label, index, callback, callback_context);
+}
+
+void SubmenuVM::set_selected_item(uint32_t index) {
+    submenu_set_selected_item(submenu, index);
+}
+
+void SubmenuVM::set_header(const char* header) {
+    submenu_set_header(submenu, header);
+}