fix key map combinations modifiers

src/Input.cpp

@@ -29,10 +29,19 @@ void Input::load_key_map()
         {
             for (std::string part : entry.value())
             {
-                ctrl = part == "CTRL";
+                if (part == "CTRL")
-                shift = part == "SHIFT";
+                {
-                alt = part == "ALT";
+                    ctrl = true;
-                if (not ctrl and not shift and not alt)
+                }
+                else if (part == "SHIFT")
+                {
+                    shift = true;
+                }
+                else if (part == "ALT")
+                {
+                    alt = true;
+                }
+                else
                 {
                     key = get_key_code(part);
                 }