The save abstraction operation must use the basename without the extension for
the object name. This regression was introduced in rev. 752294af, the present
commit corrects this while still preventing string overflows.

Add a reminder to upgrade packages and add a line break to improve
readability (make a line code as code appearance).

Fix - Punctuations

See merge request jwilkes/purr-data!614

Not sure what this was used for. Could have been a remnant from ancient
Pd-extended builds where libdl was required to dynamically load at all,
but that's a shot in the dark.

Anyway, if we get reports in a future release of some external randomly
refusing to load under Windows, we may want to test whether this change
is the culprit.

This gives what is to me smoother and more predictable snapping motion with
respect to the current mouse position.

For example-- imagine the grid cell size is 10 and the selected object under
the mouse already has its top left corner aligned with vertical grid line #2.

If I begin dragging that object to the left, within a single pixel of motion
it will snap to vertical grid line #1 which is 9 pixels away from the
object's current position.

With this commit, the user must drag the object cellsize / 2 pixels before it
snaps to a new position.

To me this seems smoother as it rounds to the nearest grid line rather than
to the grid line with the smallest coordinate value.