Double-click to select full text in LineEdit does not working

[Chaosus]

Godot version

8c8feb3

System information

Windows 10

Issue description

It's possible to select a text by double-clicking at the end of LineEdit in 3.x:

But it's not possible in 4.0:

Steps to reproduce

You can observe it in the LineEdit in the FileSystem ^^

Minimal reproduction project

Too easy to reproduce

[jmb462]

The problem is that double clic word selection is broken after the last word.
Because of that, triple clic whole text selection is never detected after the last word (triple clic timer is not correctly updated)