fix(inline edit): remove clear element in internet explorer

[mcoker]

fix #1076

Description

There are 2 "x" (clear) icons when editing a text input in IE/edge, because IE has a native pseudo element to clear an input.

Changes

Hiding the IE clear element and using the patternfly icon for consistency.

Link to rawgit and/or image

The build is failing for the tertiary navigation test below, which should have nothing to do with the inline edit pattern.

https://travis-ci.org/michael-coker/patternfly/builds/411338357

compare | ERROR { requireSameDimensions: false, size: isDifferent, content: 11.61%, threshold: 7% }: navbar-tertiary-menu-submenu-default-selected backstop_default_navbar-tertiary-menu-submenu-default-selected_0_container_0_large-device.png

PR checklist (if relevant)

• Cross browser: works in IE9
• Cross browser: works in IE10
• Cross browser: works in IE11
• Cross browser: works in Edge
• Cross browser: works in Chrome
• Cross browser: works in Firefox
• Cross browser: works in Safari
• Cross browser: works in Opera
• Responsive: works in extra small, small, medium and large view ports.
• Preview the PR: An image or a URL for designer to preview this PR is provided.