A Windows Phone version of the HTC One has been a long-standing rumor, but it now appears the handset might be close to launching imminently. The Verge revealed at the weekend that HTC is testing a Windows Phone version of the One M8, and WP Central now claims the device will launch on Verizon on August 21st. Labelled the “One (M8) for Windows,” HTC’s latest Windows Phone is expected to be a carbon copy of its Android handset, complete with BoomSound speakers and Duo cameras. HTC’s One M8 for Windows will likely ship with Windows Phone 8. …