Fix spell checks

src/MenuItem.h

@@ -82,12 +82,12 @@ class MenuItem {
     void setText(const char* text) { this->text = text; };
     /**
      * @brief Process a command decoded in 1 byte.
-     * It can be a printable charactor or a control command like `ENTER` or `LEFT`.
-     * Return value is used to determine operation was successfull or ignored.
+     * It can be a printable character or a control command like `ENTER` or `LEFT`.
+     * Return value is used to determine operation was successful or ignored.
      * If the parent of item received that handle was ignored it can execute it's own action on this command.
      * Thus, the item always has priority in processing; if it is ignored, it is delegated to the parent element.
      * Behaviour is very similar to Even Bubbling in JavaScript.
-     * @param c the character, can be a printable charactor or a control command
+     * @param c the character, can be a printable character or a control command
      * @return true if command was successfully handled by item.
      */
     virtual bool process(const unsigned char c) { return false; };

src/input/KeyboardAdapter.h

@@ -79,7 +79,7 @@ class KeyboardAdapter : public InputInterface {
     Stream* stream = NULL;
     /**
      * Internal state of current code set.
-     * As stream receives bytes asyncronously, multiple bytes command can arrive
+     * As stream receives bytes asynchronously, multiple bytes command can arrive
      * in several calls. Need to store current state between calls.
      */
     CodeSet codeSet = CodeSet::C0;