changed bottom navigation return behavior

[urotarou]

Issue

• none

Overview (Required)

• Pop up to the start destination of the graph to avoid building up a large stack of destinations on the back stack as users select items.
• Sorry if the current behavior is the expected specification.

Links

• https://developer.android.com/jetpack/compose/navigation?hl=ja#bottom-nav

Screenshot (Optional if screenshot test is present or unrelated to UI)

• none

Movie (Optional)

Before	After

[github-actions[bot]]

Test Results

215 tests   215 :heavy_check_mark:  8m 37s :stopwatch:   11 suites      0 :zzz:   11 files        0 :x:

Results for commit f72a19f1.

:recycle: This comment has been updated with latest results.