[MOVEONLY] consensus: move amount.h into consensus

Move amount.h to consensus/amount.h.
Renames, adds missing and removes uneeded includes.

src/qt/walletmodeltransaction.h

@@ -8,7 +8,7 @@
 #include <primitives/transaction.h>
 #include <qt/sendcoinsrecipient.h>
 
-#include <amount.h>
+#include <consensus/amount.h>
 
 #include <QObject>