Add border radius to all progress indicators

This applies `ProgressIndicator` and all its derived classes:
* `LinearProgressIndicator `
* `CircularProgressIndicator `
* `RefreshProgressIndicator `

### Examples for each of the indicators

<div style="display:flex;">
<img width="33%" src="https://user-images.githubusercontent.com/39104740/99975823-bee4e580-2db3-11eb-8f47-03f9f183d0a6.png"/>
<img width="33%" src="https://user-images.githubusercontent.com/39104740/99976710-d8d2f800-2db4-11eb-895c-ca4e3a6d3c44.png"/>
<img width="33%" src="https://user-images.githubusercontent.com/39104740/99976133-1e42f580-2db4-11eb-97bd-4d613856339b.png"/>
</div>


### Current appearance

<div style="display:flex;">
<img width="33%" src="https://user-images.githubusercontent.com/39104740/99979600-4fbdc000-2db8-11eb-9505-c4f1a6f8ec12.png"/>
<img width="33%" src="https://user-images.githubusercontent.com/39104740/99979366-12f1c900-2db8-11eb-8b1b-58d92837fd52.png"/>
<img width="33%" src="https://user-images.githubusercontent.com/39104740/99979917-b511b100-2db8-11eb-9bbd-0e569f63fd5d.png"/>
</div>



Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Add border radius to all progress indicators #71085

Examples for each of the indicators

Current appearance

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Add border radius to all progress indicators #71085

Description

Examples for each of the indicators

Current appearance

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions