docker images not listed in sidebar

Issue Type: Bug

images not listed on docker images sidebar
containers hub are listed correctly
images do list under powershell console

// Interval (in milliseconds) to auto-refresh containers list. Set 0 to disable auto-refresh.
"docker-explorer.autoRefreshInterval": 1000,

// Options to show container logs.
"docker-explorer.containerLogsOptions": "--tail 50 -f",

// Whether to enable anonymous usage collection.
"docker-explorer.enableTelemetry": true,

// Command to execute in container.
"docker-explorer.executionCommand": "",

// Whether to show Azure Container Registry Explorer.
"docker-explorer.showAzureRegistries": true,

// Whether to show Docker Containers Explorer.
"docker-explorer.showDockerContainers": true,

// Whether to show Docker Hub Explorer.
"docker-explorer.showDockerHubTreeView": true,

// Whether to show Docker Images Explorer.
"docker-explorer.showDockerImages": true,

// Whether to show Suggested Docker Hub Images Explorer.
"docker-explorer.showSuggestedDockerImages": true

from docker:
Version: 18.03.1-ce-win65 (17513)
Channel: stable
Sha1: 93354b38bd7210badafff8e0ce1f0be9a465be83
Started on: 2018/07/02 08:00:59.051
Resources: C:\Program Files\Docker\Docker\Resources
OS: Windows 10 Pro
Edition: Professional
Id: 1803
Build: 17134
BuildLabName: 17134.1.amd64fre.rs4_release.180410-1804

Extension version: 0.1.6
VS Code version: Code 1.24.1 (24f62626b222e9a8313213fb64b10d741a326288, 2018-06-13T17:51:32.889Z)
OS version: Windows_NT x64 10.0.17134

System Info

|Item|Value|
|---|---|
|CPUs|Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz (8 x 3592)|
|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: unavailable_software
webgl: enabled
webgl2: enabled|
|Memory (System)|31.91GB (5.60GB free)|
|Process Argv|C:\Program Files\Microsoft VS Code\Code.exe|
|Screen Reader|no|
|VM|33%|