[BUG, CSS, Emmet] suggestion color if said "#" like "id"....

[ghost]

Issue Type: Bug
if I don't write selector in root scope but for example in media query, it suggest colors and attributes.

#42245

VS Code version: Code 1.25.1 (1dfc5e5, 2018-07-11T15:43:53.668Z)
OS version: Windows_NT x64 10.0.17134

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 x 2808)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: disabled_software video_decode: enabled video_encode: enabled vpx_decode: enabled webgl: enabled webgl2: enabled
Memory (System)	15.88GB (10.83GB free)
Process Argv	C:\Program Files\Microsoft VS Code\Code.exe
Screen Reader	no
VM	0%

Extensions: none

[ramya-rao-a]

That position is a valid position for both css property/value as well as a css rule.
So, I cannot prevent emmet altogether in that position.

But # followed by anything that is not a hexadecimal is an invalid abbreviation, so I've pushed a fix for that.

So, ul#123abc is valid but ul#something is not