SpectralProfileRenderer with customized expression

[Benjamin Jakimow]

Enable the SpectralProfileRender to match ProfileStyles by evaluating expressions

• add general switch: show selected only yes/no/complement (internal pre-selection)
• define render rules a set of QgsExpressions to filter for matching SpectralProfileQgsFeature)
• first matching expression defines the PlotStyle
• none-matching SpectralProfiles are rendered in default style (as-is)
• SpectralProfiles in the AttributeTable define the superset of profiles that can be plotted. Filtering the AttributeTable will filter the plotted profiles as well
• implement a SpectralProfileRendererConfigWidgetFactory(QgsMapLayerConfigWidgetFactory)
• implement a SpectralProfileRendererConfigWidget(QpsMapLayerConfigWidget)

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[Benjamin Jakimow]

changed concept with Speclib V2 based on QgsExpression