Backport of LPS-116201 - Line-height property causes truncated text

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.2.X
• Fix Version/s: 7.2.10 DXP FP9, 7.2.X
• Component/s: CKEditor, Liferay Themes
• Labels:
  • ee-7.2.x-only
  • ee-ts
  • liferay-fixpack-dxp-9-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/21117

Reproduction steps:

1. Set up 7.2.x by applying the following property to portal-ext in order to enable CKEditor:

editor.wysiwyg.portal-impl.portlet.ddm.text_html.ftl=ckeditor

1. Start and and log in as admin. 
2. Create a new Web Content
3. Type or paste multiple lines of text (at least 3-5)
4. Select multiple lines of text with cursor

Expectation:

The text is actually selected and all the text are still fully visible

Actual behavior:

The bottom of the text is truncated (see screenshot) of each line, except the last one in selection.
If the page is zoomed in the browser (at about 150%), the behavior is more visible - it seems the blue selection highlight is slightly covering the line of text above.

Reproduced on 7.2.x.

Not reproducible on master.

Issue is related to story ticket LPS-116201 - line-height property causes the issue and removing only this property fixes it.