## Issue
6832: Pass through commenting error if it fails current error list
## Changes
- Refactor the error-msg-replacing code to make it easier to add new ones in the future.
- Made the new error message localizable (i.e. extract the variable value, pass to `__()`)
- Fallback to Commentron original message for those unhandled ones (usually fresh messages from Commentron).
Renamed variables for clarity while at it.
"Item added to %name%" is probably redundant due to toast passing through <i18nMessage>, causing a double translation.
Anyway, added all the resolved string for now to avoid them popping up in app-string during development.
## Changes
1. Add hint on adding "Closes", "Fixes", etc. keywords to directly update the Issue state when the PR gets merged
2. Collapse "PR Checklist" and "PR Type".
- With the assumption that these 2 items are mainly reminders for contributors, and that reviewers will typically only look at it one time, we collapse these sections to reduce clutter in the PR description.
## Issue
`https://github.com/lbryio/lbry-desktop/issues/6369#issuecomment-882081892`
## Changes
- Replace 'feed' with 'node-rss' for itunes spec support.
- Replace content type from 'rss+xml' to 'xml' so that the browser will display it nicely using the document tree without us having to re-format it ('node-rss' does not). Seems like all feeds that I found does it this way.
- There is no need to escape characters now that 'node-rss' does it. Nice.
## Issue
5951: OG messed up if `$"` is in title
The replacement string would contain `...$"...`. The character `$&` has special meaning in `replace`, so the output was messed up.
## Approach
Use a direct slice approach. A bit less elegant.
