Clearer attribute selection dialog, organized with group boxes
Initial dialog can accept two layers already in registry or load new ones
In initial dialog populate combos only with loss layers containing points or zonal layers containing polygons
Disable normalization variant combo when variants are not available
The user can select the attribute for merging; info messages disappear after 5s
Commit changes performed by advanced calculator only if the layer has actually been modified
Folders rearrangement
Info messages increased duration (8); small refactoring
Possibility to enable-disable actions (still missing the logic to enable the actual actions)
Enable/disable actions depending on the number of registered layers
Merge pull request #22 from gem/improve-usability

Improvements on usability