Add "Toggle full diff" checkbox to the filtering menu in filter-by-path mode

[stefanhaller]

• PR Description

Add a "Show full diff" checkbox to the filtering menu. This can be useful if you want to see the changes to the filtered file in context, and it can be used as a workaround in case the file was renamed, in which case the diff would be empty for all commits before the rename, because we would filter the diff by the path.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for da32b591	✅ 42.86%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (da32b59)	Report Missing	Report Missing	Report Missing
Head commit (781eb61)	56464	49036	86.84%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#4594)	14	6	42.86%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩