Previously, the head of the opened patch would not be displayed, and
so the user could not tell what it was if any updates were applied.
Show the head for the opened revision. The below shows the difference
between before and after, respectively:
```
├─────────────────────────────────────────────────────────────────────┤
│ ● opened by z6MknSL…StBU8Vi (you) now │
│ ↑ updated to 8d6692ce2b2219a54d09ccd5feefedb2bae33eba (02bef3f) now │
│ ↑ updated to 8438ab3940316abe65c93982a0a8f39688400359 (9304dbc) now │
╰─────────────────────────────────────────────────────────────────────╯
```
```
├─────────────────────────────────────────────────────────────────────┤
│ ● opened by z6MknSL…StBU8Vi (you) (8b0ea80) now │
│ ↑ updated to 8d6692ce2b2219a54d09ccd5feefedb2bae33eba (02bef3f) now │
│ ↑ updated to 8438ab3940316abe65c93982a0a8f39688400359 (9304dbc) now │
╰─────────────────────────────────────────────────────────────────────╯
```
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett
Allow `rad patch edit` to take a `--revision` option which will edit
the description of the specified revision, rather than the root
revision.
If the flag is not specified, then the original behaviour of editing
the root revision's title and description is used.
Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett
Fintan Halpenny