Spring cleanup

• Same name for file and folder #159 (fixed up-stream)
• Use --secure for pwgen and more configurable options #168
• Some UI tweaks #158
• Some translation updates #162
• Remove Debian packaging #166
• Clear text input: use system icon instead of x #84
• Bind a key to the clear action #142
• Flat icon bd742d6 for more modern look
• Minor cleanup and FAQ changes