README.md: Add mouse-over to supported features

Author: GeertJohan

README.md

@@ -43,11 +43,12 @@ It's also possible to [manually install](https://github.com/go-flutter-desktop/g
 - Clipboard copy & paste
 - Window title and icon
 - Standard keyboard shortcuts
-    - <kbd>ctrl-c</kbd>  <kbd>ctrl-v</kbd>  <kbd>ctrl-x</kbd>  <kbd>ctrl-a</kbd>
-    - <kbd>Home</kbd>  <kbd>End</kbd>  <kbd>shift-Home</kbd>  <kbd>shift-End</kbd>
-    - <kbd>Left</kbd>  <kbd>ctrl-Left</kbd>  <kbd>ctrl-shift-Left</kbd>
-    - <kbd>Right</kbd>  <kbd>ctrl-Right</kbd>  <kbd>ctrl-shift-Right</kbd>
-    - <kbd>Backspace</kbd>  <kbd>ctrl-Backspace</kbd> <kbd>Delete</kbd>
+  - <kbd>ctrl-c</kbd>  <kbd>ctrl-v</kbd>  <kbd>ctrl-x</kbd>  <kbd>ctrl-a</kbd>
+  - <kbd>Home</kbd>  <kbd>End</kbd>  <kbd>shift-Home</kbd>  <kbd>shift-End</kbd>
+  - <kbd>Left</kbd>  <kbd>ctrl-Left</kbd>  <kbd>ctrl-shift-Left</kbd>
+  - <kbd>Right</kbd>  <kbd>ctrl-Right</kbd>  <kbd>ctrl-shift-Right</kbd>
+  - <kbd>Backspace</kbd>  <kbd>ctrl-Backspace</kbd> <kbd>Delete</kbd>
+- Mouse-over/hovering
 
 Are you missing a feature? [Open an issue!](https://github.com/go-flutter-desktop/go-flutter/issues/new)