Make Status and Notification popup consistent with others.

Summary:
1. Remove the left margin.
2. Change '&' to "and".

Before:
{F6474493}

After:
{F6476224}

Test Plan: Open System Tray.

Reviewers: #vdg, broulik, #plasma, mart

Reviewed By: #vdg, #plasma, mart

Subscribers: fabianr, abetts, loh.tar, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D17556