Created VirtualKeyboard Widget Class

Added to VK class

Create keyboard

Built VirtualKeyboard widget and shows on
AskPassphraseDialog

Allow passing focused QLineEdit

Resize AskPassphraseDialog upon VirtualKeyboard creation.

Removed Keyboard Debugging Code

Small Aesthetic Fixes for Virtual Keyboard
- Streched Space Bar
- Window now dynamically changes dynamically when keyboard visibility is
toggled

Fixes Sigmike requested
Merge pull request #124 from SigmundAlpha/utility_keyboard

Adding Virtual Keyboard Utility to Ask Passphrase Dialog