Allow labels to contain emoji (#6063)

* Add emoji to labels
Minor cleanup of tribute code in footer.tmpl

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Quick find/replace in other i18n files containing label translations

Signed-off-by: jolheiser <john.olheiser@gmail.com>

* Revert "Quick find/replace in other i18n files containing label translations"

This reverts commit ec3e1a3a1775989301bb2c1cd08e8871b317688d.

* Add style to overwrite emoji height in labels

* Revert Makefile change that makes Windows work

routers/repo/issue_label.go

@@ -22,6 +22,7 @@ func Labels(ctx *context.Context) {
 	ctx.Data["PageIsIssueList"] = true
 	ctx.Data["PageIsLabels"] = true
 	ctx.Data["RequireMinicolors"] = true
+	ctx.Data["RequireTribute"] = true
 	ctx.Data["LabelTemplates"] = models.LabelTemplates
 	ctx.HTML(200, tplLabels)
 }