Instead of having a timeline of a patch be global and sorted by
timestamp, organise it via revisions. Each revision has an entry in
the timeline, sorted by timestamp. Under each revision, a series of
updates are inlined, also sorted by their timestamps. Currently, these
updates can either be reviews or merges.
For example:
```
├────────────────────────────────────────────────────────────────────────────┤
│ ● opened by fintohaps (you) 1 week ago │
│ └── ✓ accepted by fintohaps (you) 1 week ago │
│ ↑ updated to 5f2a123e3f2aa60f2e03815df283563495b73085 (a1c3c0f) 1 week ago │
│ └── ✓ accepted by fintohaps (you) 1 week ago │
│ └── ✓ merged by cloudhead (z6Mkt67…v4N1tRk) now │
╰────────────────────────────────────────────────────────────────────────────╯
```
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett
a8cca57c0a