Right now the target of a hyperlink on an image is static, i.e. the target must be selected from the report tree. However, if one rename a report, all hyperlinks must be adapted manually.
Therefore hyperlinks on images should also use variables as target, so that the target report is only once defined in e.g. globals, and can be changed easily with no effort for all images.
(Same thing is already possible with the HYPERLINK formula, but not on images)
