Replace package filter icon with text

[QilongTang]

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Purpose

DYN-2317
As a Dynamo user, I want to easily locate package filter within package manager.

This PR does not touch the WPF control id so any existing tests should still work.

Before:

After:

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.

Reviewers

@DynamoDS/dynamo

FYIs

@Amoursol

[Amoursol]

@QilongTang is it possible to make there more of a distinction between both buttons? There doesn't appear to the naked eye to be much of a gap between the two. Beyond that, LGTM.

[QilongTang]

@Amoursol Thanks! Added some distinction so that clearer two buttons for user. Let me know.

[mjkkirschner]

looks good to me - @smangarole are there any UI automation tests which will be effected by this?