fix: core window must receive updates

[pixelass]

Motivation

• ensure that the core window is open on page setting
• send ipc message to core window
• add additional messages for error, checking and download

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +0.94% (target: -1.00%)	:white_check_mark: 53.85%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (81198c8dd60d8e677c078e35c194c071080dc538) | 2073 | 1921 | 92.67% | | | Head commit (c2bd8f4ba2c0bfb5ee0c08c1ecc948b701c0a4dc) | 2097 (+24) | 1963 (+42) | 93.61% (**+0.94%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#288) | 39 | 21 | **53.85%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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[TimPietrusky]

:tada: This PR is included in version 1.0.0-alpha.76 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: