Mayoi 0.5.1

• COMMITS in source control draws the history as a graph, each branch
  in a lane and color of its own, and shows each commit's author, branches
  and tags; a branch and its remote's at the same commit share a badge.
  HEAD has a ring and a merge a hollow dot. The commit's tab shows its
  branches and tags too.
• Show All Branches, from the COMMITS header or the ⋯ menu, shows
  every branch and tag, not only the branch checked out. It is the
  scmAllBranches setting.
• A commit's menu checks it out, creates a branch or a tag there, and
  copies the name of its branches and tags.
• The ⋯ menu of source control no longer ignores an item chosen with
  the pointer past the sidebar, as View as Tree often was.
• A folder closed, by closing its window, File → Close Folder or
  opening another folder in its window, opens again with its tabs,
  columns and the folders open in the Explorer. Opening
  another folder in a window now closes the tabs of the one it had,
  rather than keeping them beside the new folder's.
• Tabs come back with their caret, selection, scroll position and own
  word wrap, and a diff showing every line still does, also when Mayoi
  starts again.
• The windows, tabs, recent folders and layout move from settings.json
  to state.json beside it, so settings.json holds only the
  preferences.
• Closing the last tab of a column with another after it no longer
  crashes Mayoi.