CdkConnectedOverlay offset from ConnectionPositionPair has no effect

[abdulkareemnalband]

Bug

offset from ConnectionPositionPair has no effect in CdkConnectedOverlay

What is the expected behavior?

Overlay should be positioned based on offset from cdkConnectedOverlayPositions Input

What is the current behavior?

offsets are being ignored

What are the steps to reproduce?

https://stackblitz.com/edit/cdkoverlayexample-offset?file=app%2Fabcd%2Fabcd.component.html

What is the use-case or motivation for changing an existing behavior?

each position should have its own offset values, like for tooltips

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular CLI: 1.7.2
Node: 8.9.4
OS: win32 x64
Angular: 5.2.7
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

@angular/cdk: 5.2.3
@angular/cli: 1.7.2
@angular/material: 5.2.3
@angular-devkit/build-optimizer: 0.3.2
@angular-devkit/core: 0.3.2
@angular-devkit/schematics: 0.3.2
@ngtools/json-schema: 1.2.0
@ngtools/webpack: 1.10.1
@schematics/angular: 0.3.2
@schematics/package-update: 0.3.2
typescript: 2.7.2
webpack-bundle-analyzer: 2.11.0
webpack: 3.11.0

Is there anything else we should know?

https://github.com/angular/material2/blob/7abb1db79a2cb5e7978d38c422fcb7622710be70/src/cdk/overlay/overlay-directives.ts#L365

here withOffset should work with offset from positions array
also for withFallbackPosition offset should be passed

[abdulkareemnalband]

the PR fixes issue on master, but not on v5.2 branch

v5.2 and master have totally different code path

[abdulkareemnalband]

@josephperrott is this fixed on 5.2 branch?

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