Incorrect anchor placement

[jmckean83]

Fontforge seems to incorrectly display mark-to-mark anchors (possibly other anchors too...) I notice this in the metrics window, where there seems to be a general discrepancy of about 10pts between the actual position of the anchor and how it is rendered. For example, the combining overline (U+0305), when set up to repeat over itself using mark-to-mark (as is the case in TimesNewRoman), will be shown with a gap between iterations of the mark that is wider than is actually specified. This becomes obvious if you build a new glyph using copy-and-paste to position the second iteration of the overline where the anchor is and then comparing the pre-composed character with the composed one in the metrics window. Fonts that are generated do not reflect this (i.e. they work properly according to where anchors are placed), so it seems to be a rendering/display issue within Fontforge.