hgweb: move changeset "tags" to a template in map file (paper and coal) This patch puts all these changeset "tags" into one template shared everywhere in paper and coal themes. But it should be noted that some of the templates had different sets of tags, in some cases it was intended, in others - most likely not. First, what's up with all these different ways to get changeset's branch. There are actually 3 ways to do it in hgweb, they can all be seen in this patch; "branches", "inbranch" and "branch". They are all lists that consist of 1 or 0 items: - "branches" has ctx.branch() if current changeset is the tip of that branch - "inbranch" has ctx.branch() if current changeset is _not_ the tip of that branch and the branch is not "default" - "branch" aka "changesetbranch" has ctx.branch() if the branch is not "default" The majority of cases (7 vs 2 + /graph) in paper theme used only option 3, which meant that "default" was never displayed. But other parts of the theme disagreed with this and used option 1 and option 2 together. For example, the default view (log) displays "default" on the branch tip (can be seen right about now on m-s.o/repo/hg), but it disappears when you click on the commit. Also, using option 3 alone meant that there was no way to tell if a changeset is the tip of its branch or not (it was always assumed that it's not, see how some css classes change from "branchname" to the correct "branchhead" in tests) -- so the two different css styles that exist in paper just for this were underused. I think this patch improves the situation, even though it changes the old (even if inconsistent) behavior. The new behavior matches that of gitweb and monoblue.