The Nexus line may be on its last legs, but a spiritual successor to its great Nexus 7 tablet could be in the wings.Noted tech leaker Evan Blass has tweeted that Huawei will be taking up the mantle "before the end of the year" with a 7-inch device rocking 4GB of RAM.Could the "new Nexus" launch alongside the Pixel and Pixel XL Google...