FiltersDialog now uses a color picker for color selection #194
+216
−182
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-FiltersDialog no longer uses a drop down box of predefined SVG color strings. In place it uses two push buttons that launch a QColorDialog. This allows for custom color specification.
-refactored Filter class to use QColor for its fore and back colors, instead of the old approach which uses strings. This reduces coupling with UI.
-incrememnted FilterSet::FILTERSET_VERSION to 2, since Filters now store custom colors. These colors are saved in config as hex strings. BACKWARDS COMPATIBILITY IS MAINTAINED WITH VERSION 1 CONFIG FILES. (made the assumption that backwards compatibility should always be maintained.)