Coin selection fix, button to send all the money

[fastpok]

This pull request makes the following changes:

• Fixes #1024.
• Refactoring of Sepulcas.Elements.Input module.
• Added the "Tor and proxy" page to the wallet settings page after authorization. Also the design of the "tor and proxy" page has been slightly changed.
• Removed unused settings such as settingsReqUrlNum and settingsActUrlNum.
• Fixes #1031.
• Adds tests for coin selection algorithm.