[Qt] add expert section to wallet tab in optionsdialog
Qt: Fix ESC in disablewallet mode

Fixes issue #3854
Consistent use of 'sudo' in unix build doc
Merge pull request #3906

7211bce Consistent use of 'sudo' in unix build doc (Mikael Wikman)
Merge pull request #3892

b8edf6c Qt: Fix ESC in disablewallet mode (Wladimir J. van der Laan)
Merge pull request #3850

16d281b [Qt] add expert section to wallet tab in optionsdialog (Cozz Lovan)