Modernize View Properties window

Summary:
Like D12571, but for the {nav View Properties} Window. Also did a little bit of re-organization. This allows us to use a `QFormLayout` as the top-level layout and simplify the code a lot, including no longer using the now-unnecessary paradigm of putting a layout inside a `QWidget`, and ending the use of `QGridLayout` to make a fake and more complicated form-style layout.

Depends on D13749

Test Plan:
Window still resizes properly when the Additional Information content is shown or hidden.

Global view properties, additional information hidden:
{F6035943}

Global view properties, additional information shown:
{F6035945}

Per-folder view properties, additional information hidden:
{F6035869}

Per-folder view properties, additional information shown:
{F6035870}

Reviewers: #dolphin, elvisangelaccio, broulik, #vdg

Reviewed By: #dolphin, elvisangelaccio

Subscribers: abetts, kfm-devel

Tags: #dolphin

Differential Revision: https://phabricator.kde.org/D13768

0 files changed, 0 insertions, 0 deletions