Hide soft keyboard after submitting search query throughout app (#5837)

* Clear focus from SearchView when submitting a search query in BrowseSourceController

* Revert "Clear focus from SearchView when submitting a search query"

* Implement SearchView focus clearing in Tachiyomi's subclass to enable feature throughout app

* Add support for keyboard Enter key

Pressing enter on a keyboard (when using the emulator for example) now also submits the query

app/src/main/java/eu/kanade/tachiyomi/widget/TachiyomiSearchView.kt

@@ -2,6 +2,7 @@ package eu.kanade.tachiyomi.widget
 
 import android.content.Context
 import android.util.AttributeSet
+import android.view.inputmethod.EditorInfo
 import androidx.appcompat.widget.SearchView
 import androidx.core.view.inputmethod.EditorInfoCompat
 import eu.kanade.tachiyomi.R
@@ -39,6 +40,18 @@ class TachiyomiSearchView @JvmOverloads constructor(
         }.launchIn(scope!!)
     }
 
+    override fun setOnQueryTextListener(listener: OnQueryTextListener?) {
+        super.setOnQueryTextListener(listener)
+        val searchAutoComplete: SearchAutoComplete = findViewById(R.id.search_src_text)
+        searchAutoComplete.setOnEditorActionListener { _, actionID, _ ->
+            if (actionID == EditorInfo.IME_ACTION_SEARCH || actionID == EditorInfo.IME_NULL) {
+                clearFocus()
+                listener?.onQueryTextSubmit(query.toString())
+                true
+            } else false
+        }
+    }
+
     override fun onDetachedFromWindow() {
         super.onDetachedFromWindow()
         scope?.cancel()