Dyson accessory wall mount expander: No drop

Adaptation of the Dyson wall mount adapter that removes the vertical offset which can get in the way of certain accessories. It does maintain the horizontal offset that brings the outer adapter slots a bit further from the wall, also for better accessory clearance. This maintains the tightened tolerances of my other models.

The main reason the other versions have the vertical offset is for print direction purposes, but since we've removed that we need to support the tab that locks the adapter into the wall mount.  This means that you're going to have a support interface on the tab so it won't come out quite as clean as the other versions but it will work great.  Expect to do a small amount of cleanup where those supports meet the tab.

Version 1.1 print consistency fix - The supports have been heavily tweaked to solve the inconsistent printing of the tab that some users were running into.  The issue was that the thin support was the only thing holding up the tab, the side-to-side printing motion could be too much for it and the tab would fail.  The supports are now more robust without using much more filament, and the inner and outer supports now meet in two places which makes for a massive improvement in stability, solving the issue.  It took a lot of tweaking (and a thin sacrificial support layer) to get them to do this so I suggest keeping the support settings as-is. 

The update should make for reliable printing now, please let me know how it goes!