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9c29d688e7
**This PR creates a new core reusable component wraps a character counter around any input.**
The component accepts the arguments: `max` (the maximum character limit), `value` (the value of text to be monitored).
It can be used for example, like so:
```hbs
<CharCounter @max="50" @value={{this.charCounterContent}}>
<textarea
placeholder={{i18n "styleguide.sections.char_counter.placeholder"}}
{{on "input" (action (mut this.charCounterContent) value="target.value")}}
class="styleguide--char-counter"></textarea>
</CharCounter>
```
**This PR also:**
1. Applies this component to the chat plugins edit channel's *Edit Description** modal, thereby replacing the simple text area which provided no visual indication when text exceeded the max allowed characters.
2. Adds an example to the `/styleguide` route
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| .. | ||
| _index.scss | ||
| badges.scss | ||
| banner.scss | ||
| bookmark-list.scss | ||
| bookmark-modal.scss | ||
| buttons.scss | ||
| char-counter.scss | ||
| color-input.scss | ||
| conditional-loading-section.scss | ||
| convert-to-public-topic-modal.scss | ||
| d-toggle-switch.scss | ||
| d-tooltip.scss | ||
| date-input.scss | ||
| date-picker.scss | ||
| date-time-input-range.scss | ||
| date-time-input.scss | ||
| download-calendar.scss | ||
| footer-nav.scss | ||
| group-member-dropdown.scss | ||
| groups-form-membership-fields.scss | ||
| hashtag.scss | ||
| horizontal-overflow-nav.scss | ||
| iframed-html.scss | ||
| ignored-user-list.scss | ||
| keyboard_shortcuts.scss | ||
| navs.scss | ||
| pick-files-button.scss | ||
| relative-time-picker.scss | ||
| share-and-invite-modal.scss | ||
| svg.scss | ||
| tap-tile.scss | ||
| time-input.scss | ||
| time-shortcut-picker.scss | ||
| user-card.scss | ||
| user-info.scss | ||
| user-status-message.scss | ||
| user-status-picker.scss | ||
| user-stream-item.scss | ||
| user-stream.scss | ||
| widget-dropdown.scss | ||