[FrontPort #429] Dismiss bottom sheet on subscribe/unsubscribe to issue & Fix (#428)

Merge branch 'master' into 427-dismiss-bottom-sheet

Does not really fix the issue as there is way to handle this without a proper call.
And dismiss does not work properly either.

But added few improvements and fixed close/reopen issue along the way.

Co-authored-by: 6543 <6543@noreply.gitea.io>
Reviewed-on: https://gitea.com/gitnex/GitNex/pulls/428
Reviewed-by: 6543 <6543@noreply.gitea.io>

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.2'
+        classpath 'com.android.tools.build:gradle:3.6.3'
 
     }
 }