Fix various typos

[luzpaz]

Typos found via codespell -q 3 -L te,ridiculus,varius

Note: a source typo wasn't included in this PR. See below (Offest->Offset):

diff --git a/src/DockOverlay.cpp b/src/DockOverlay.cpp
index 3ae43a2..cff19ae 100644
--- a/src/DockOverlay.cpp
+++ b/src/DockOverlay.cpp
@@ -912,9 +912,9 @@ void CDockOverlayCross::updatePosition()
 {
        resize(d->DockOverlay->size());
        QPoint TopLeft = d->DockOverlay->pos();
-       QPoint Offest((this->width() - d->DockOverlay->width()) / 2,
+       QPoint Offset((this->width() - d->DockOverlay->width()) / 2,
                (this->height() - d->DockOverlay->height()) / 2);
-       QPoint CrossTopLeft = TopLeft - Offest;
+       QPoint CrossTopLeft = TopLeft - Offset;
        move(CrossTopLeft);
 }

[githubuser0xFFFF]

Thank you very much

[luzpaz]

@githubuser0xFFFF is the source typo valid ? Do you want me to make a PR for it ?