don't try to set property mapping if there is no value

Change-Id: I422d651e303553e2ce30895b44b8d96664418c19
add test case for property mapping

Change-Id: Ib8630d15f40b00c8620eeb1c79d5d9f00d07ef49
extract common code

Change-Id: I9327f232f1edb9ef052eb7868ac60774f3b6e4cf
show the property mapping sequences by default

Change-Id: I32417ed53e491a66f700e77ae0fff2154fa5441c
remove now unused dialog

Change-Id: I42c340a6aee016e37ee558d46a8eab101837e9c5
use the correct default value, fdo#78080

Change-Id: I8b01bf22e8e3b98ef013b947f617905d558d3554
add test case for fdo#78080

Change-Id: If676eb03f5bd19f8abf13d1d7826d500d51e542e