generate svi when wheighting dialog is opened and reuse the same index on each calculation.
remove placeholder text
print an allert for method not zet implemented
typo
Merge branch 'draw-iri' into merge-loss-into-zonal-layer

Conflicts:
	svir/svir.py
Check SAGA import; Keep socioeconomic and loss data together in zonal_layer and work on that when calculating indices