Fix width and height of data svg images in IE10

[mort3za]

Inline svg of custom-select is broken in IE10 because there is no width and height attributes.
Tested on a real IE10 in browserstack, it works.

[XhmikosR]

If this lands it needs to target master and also make sure all other SVGs don't have this issue.

[XhmikosR]

Changed the target branch so that it can't be merged blindly. See my message above.

[MartijnCuppens]

He did a PR targeting the master branch here: #28882. I asked him to do target the v4-dev branch because we're dropping IE10 support anyway. If you prefer the master branch to be targeted, you can close this PR and reopen #28882, @XhmikosR.

[XhmikosR]

Switched this to v4-dev-xmr.

But yeah, master is moot indeed.

[XhmikosR]

I'd still appreciate someone checking the other inline SVGs, because IIRC we don't use width/height.

[mort3za]

@XhmikosR I'll check them today

[mdo]

Going to make a note of this for my v5 forms branch at #28450 to at least confirm sizing works in IE11+, Edge, etc as I'm intending.

[MartijnCuppens]

Only IE10 seems to have this is issue afaik.

[mdo]

Yeah, it just reminded me that I don't recall if there are any major hiccups and we're going all in on custom forms in v5. With new SVGs, I want to make sure I'm keeping things in mind and can document known issues to help folks customize.

[mort3za]

Searched entire project, only variables.scss has such inline SVG images. Pull request updated.

[XhmikosR]

@twbs/css-review: can you review one final time please?