Insert key overrides cursor style

[javier-godoy]

The handling of Insert in ConsoleAddon writes hardcoded DECSCUSR sequences (CSI 2 q / CSI 3 q) which override the configured CursorStyle option.

[javier-godoy]

This is related to the following to-do comment:

XTermConsoleAddon/src/main/java/com/flowingcode/vaadin/addons/xterm/ITerminalConsole.java

Line 39 in 7a64e44

// TODO set cursor properties (blink, style, width) separately for insert and overwrite modes