The input highlight can now be enabled for ios. Fixed wp’s
valid/invalid highlighting. The highlight bar now goes on top of the
item-inner border so it will resize if there is an icon to the left.
BREAKING CHANGES:
Fixed typos in the input highlight variables:
- `$text-input-md-hightlight-color-valid` ->
`$text-input-md-highlight-color-valid`
- `$text-input-wp-hightlight-color-valid` ->
`$text-input-wp-highlight-color-valid`
Modified variables to turn on/off the highlight:
ios (defaults to false for all):
```
$text-input-ios-show-focus-highlight: false !default;
$text-input-ios-show-valid-highlight:
$text-input-ios-show-focus-highlight !default;
$text-input-ios-show-invalid-highlight:
$text-input-ios-show-focus-highlight !default;
```
md (defaults to true for all):
```
$text-input-md-show-focus-highlight: true !default;
$text-input-md-show-valid-highlight:
$text-input-md-show-focus-highlight !default;
$text-input-md-show-invalid-highlight:
$text-input-md-show-focus-highlight !default;
```
wp (defaults to true for all):
```
$text-input-wp-show-focus-highlight: true !default;
$text-input-wp-show-valid-highlight:
$text-input-wp-show-focus-highlight !default;
$text-input-wp-show-invalid-highlight:
$text-input-wp-show-focus-highlight !default;
```
fixes#6449
references #5052
