Implement "issuant From"

We have code to display and "half" of a charge, and so can use this (with some appropriate positioning) to implement "issuant from X", where X can be an ordinary, or perhaps the edges of the shield. The charge will usually "issue" upwards, with exceptions for the sides of the shield and maybe others...?

Start by locating the existing code that displays and halves a charge, then trace how charge positioning is handled. Done means supporting charges issuing from an ordinary and potentially the shield edges, including upward, side, and other required orientations.

Written by the indexing model from the issue text.