+ in contextTabController: added fillOperatorSelection() --> consistent with fillInputField() and fillOperatorSelection()
# in contextTabController: corrected test: operator == "NO_VALUE"
# in contextTabController: adjusted test if multiple context infos > 2 then show "all or one" selection
# in contextTabController: made formatMultiContextInfosElements() process one item, not all
# in contextTabController: for each fill.*() function check for chosen value/operator (i.e. if this is in edit mode) and render fields/selections accordingly
- in contextInfoController: removed test for "Error999" (i.e. context info added more than once)
# started overhauling locationInfoMapViewController --> TODO: check if it works in edit mode