Always track remote master branch

Update README

Force immediate update on wxGTK

- Trigger immediate redraw instead of queuing up redraw operations
- This avoids an issue with wxGTK on Wayland absorbing redraw operations

Fix grammatical errors in README.md

Fix grammatical errors in README.md

Remove CI compiler version for Linux build

- Just take the default one offered in the image
- It removes the burden of iterating the version each time

Refined New Grid and Add Image icons (#642)

Change keybinding from F7 to Alt+0 in French tutorial

Make it clearer which wxWidgets to get and how

Use icons from Visual Studio Code in the toolbar (#641)

* Use icons from Visual Studio Code in the toolbar

* Fix preposition