force create SVI before weighting
add important fields to project definition
pass correct data to redraw_ir_layer on ok click
color map according to svi
show IRI if available, if not svi
initial rule based rendering support
better code, allows removing the default rule
refactoring code
fixed the labels
refactor code to allow programmatically calling calculate_IRI and calculate_SVI
Refactor to allow recalculating indexes when  weights are changed.
Clean up imports and added license header
Added auto updating map on weight changes, only needs fix in delete_attributes
readded 5219b3511710d30a9791eefd649b0743702cc670
allow weighting before calculating index by automatically creating one
Turn on DEBUG if developer mode is activated
update self.current_layer when no layer is enabled
remove placeholder text and make label selectable
disable ok button until there is at least one indicator
add instant test for valid indicator name