UI/UX: make the plugin window/dialog a panel/dockable

[gioman]

Given that the plugin dialog is non-blocking the main QGIS window, then I think that using a dockable panel it would provide a better user experience.

[alexbruy]

Just for the record, non-modal dialog was one of the original requirements.

[gioman]

Just for the record, non-modal dialog was one of the original requirements.

@alexbruy ok let me check again.