Hanging shift key after keyboard input on Windows #157

Version
1.4.1

Short overview
When typing a string via typeString method the Shift key is constantly pressed and not released, no matter whether it has been actually pressed or not. Key will be released as soon as manual input follows.

Issue occurs on

• Virtual machine
• Docker container
• Dev/Host system

Step to reproduce:

See nut-tree/libnut-core#12