**As** a user
**I want** the notification row that is open in the split screen to be highlighted
**so that** I see the connection between the split screen and the center page

As an example, have a look at this screenshot, where it is very hard to see to which notification row the split screen belongs to:

<figure class="image Begin of the insertionop-uc-figure" style="width:50%;"><divEnd of the insertion Begin of the deletion op-uc-figure"><divEnd of the deletion class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/22287/content"></div></figure>

**Acceptance criteria**

* The notification row, that is currently open in the split screen, is highlighted via a blue background color Begin of the deletion
* The color is the same we use when a Work package row is selectedEnd of the deletion
* When hovering over the rows, they are highlighted in a grey Begin of the insertioncolor
* The styling is updated to the latest specification:End of the insertion Begin of the deletion color End of the deletion
* Begin of the insertionThe rows have a white background
* The are no borders onEnd of the insertion Begin of the deletion Again we useEnd of the deletion the Begin of the insertionleft and onEnd of the insertion Begin of the deletion same as inEnd of the deletion the Begin of the insertionright
* There is no space betweenEnd of the insertion Begin of the deletion work package table:End of the deletion the Begin of the insertionrows

<figure class="image op-uc-figure" style="width:50%;"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/22301/content"></div></figure>End of the insertion Begin of the deletion grey color for the hover effect of a WP row.End of the deletion