Finish WB-396: When palette color bar is displayed in a matrix chart, reduce the size of the matrix chart so that it does not overlap the palette color bar.
Adjusted spacing in ToolBar View and Chart Type groups so that the radio buttons and text do not overlap (at least on Mac) and so that the radio buttons are not cut off at the bottom.
Removed GiftiTypeFile::getMapIndexFromName() as it was overriding CaretMappableDataFile::getMapIndexFromName(const AString& mapName) const without the 'const' causing a compilation warning and it duplicated the functionality of the version in CaretMappableDataFile.
Re-resolved WB-278: CIFTI volume data should allow volume viewing.  CiftiMappableDataFile::getVoxelSpaceBoundingBox() was using the 'volume dimensions' but forgot to make call to getDimensions() and using all zeros for the volume dimensions.