Fix some layout issues

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomFragment.kt

@@ -15,7 +15,6 @@ import android.support.v7.widget.LinearLayoutManager
 import android.support.v7.widget.RecyclerView
 import android.text.method.ScrollingMovementMethod
 import android.view.*
-import android.widget.ImageButton
 import chat.rocket.android.R
 import chat.rocket.android.chatroom.presentation.ChatRoomPresenter
 import chat.rocket.android.chatroom.presentation.ChatRoomView
@@ -250,10 +249,8 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiFragment.EmojiKeyboardLi
     override fun onKeyPressed(keyCode: Int) {
         when (keyCode) {
             KeyEvent.KEYCODE_BACK -> with(text_message) {
-                    if (selectionStart > 0) {
-                        text.delete(selectionStart - 1, selectionStart)
-                    }
-                }
+                if (selectionStart > 0) text.delete(selectionStart - 1, selectionStart)
+            }
             else -> throw IllegalArgumentException("pressed key not expected")
         }
     }
@@ -298,7 +295,7 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiFragment.EmojiKeyboardLi
                     activity?.let {
                         val fragment = EmojiFragment.getOrAttach(it, R.id.emoji_fragment_placeholder, composer)
                         if (fragment.isCollapsed()) {
-                            fragment.show()
+                            fragment.openHidden()
                         }
                         setReactionButtonIcon(R.drawable.ic_reaction_24dp)
                     }

app/src/main/java/chat/rocket/android/widget/emoji/EmojiFragment.kt

@@ -98,7 +98,6 @@ class EmojiFragment : Fragment() {
                             EmojiRepository.saveKeyboardHeight(currentKeyboardHeight)
                             setKeyboardHeight(currentKeyboardHeight)
                             softKeyboardVisible = true
-                            openHidden()
                         } else if (lastVisibleDecorViewHeight + MIN_KEYBOARD_HEIGHT_PX < visibleDecorViewHeight) {
                             // Notify listener about keyboard being hidden.
                             softKeyboardVisible = false

app/src/main/res/layout/message_composer.xml

@@ -33,7 +33,6 @@
             android:layout_height="wrap_content"
             android:layout_marginEnd="10dp"
             android:layout_marginStart="10dp"
-            android:gravity="center_vertical"
             android:orientation="horizontal"
             android:paddingBottom="10dp"
             android:paddingTop="10dp"
@@ -43,27 +42,31 @@
                 android:id="@+id/button_add_reaction"
                 android:layout_width="24dp"
                 android:layout_height="24dp"
+                android:layout_gravity="bottom"
                 android:layout_marginEnd="16dp"
                 android:background="?attr/selectableItemBackgroundBorderless"
-                android:clickable="false"
                 android:contentDescription="@string/msg_content_description_show_attachment_options"
                 android:src="@drawable/ic_reaction_24dp" />
 
             <chat.rocket.android.widget.emoji.ComposerEditText
                 android:id="@+id/text_message"
                 android:layout_width="0dp"
-                android:layout_height="24dp"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center_vertical"
                 android:layout_marginEnd="16dp"
                 android:layout_weight="1"
                 android:background="@android:color/transparent"
                 android:hint="@string/msg_message"
+                android:inputType="textCapSentences|textMultiLine"
                 android:maxLines="4"
+                android:minHeight="24dp"
                 android:scrollbars="vertical" />
 
             <ImageButton
                 android:id="@+id/button_show_attachment_options"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_gravity="bottom"
                 android:background="?attr/selectableItemBackgroundBorderless"
                 android:contentDescription="@string/msg_content_description_show_attachment_options"
                 android:src="@drawable/ic_add_24dp" />
@@ -72,6 +75,7 @@
                 android:id="@+id/button_send"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:layout_gravity="bottom"
                 android:background="?attr/selectableItemBackgroundBorderless"
                 android:contentDescription="@string/msg_content_description_send_message"
                 android:src="@drawable/ic_send_24dp"