Lessen indent before "Send files" in main activity
The "Send files" button in main acitivity if connected has a larger
indent then the other buttons. This happens on most pixel densities.
Reason was the larger icon the "Send files" button has.
With this patch, the icons all have the same pixel dimensions. It
solves the too large indent.
Screenshot (Because of translation, "Send files" is translated to
Reviewers: KDE Connect, apol, nicolasfella
Reviewed By: KDE Connect, nicolasfella
Subscribers: nicolasfella, apol, kdeconnect
Tags: KDE Connect
Differential Revision: https://phabricator.kde.org/D14344