fix(StatusChatInput): fix text area alignment so it doesn't jump

There was a UI bug in the StatusChatInput where, only in the timeline view,
the scrollview wrapping the textarea would have a weird behaviour in which
it would render the visible text(placeholder) *lower* than how it's actually
positioned. Once the textarea is clicked, it would re-adjust with a smooth
scroll.

Obviously this is undesired behaviour as the text should always render in the
correct position.

This commit finally fixes this weird behaviour by moving the dynamic height
calculation to the wrapping Rectangle and changing the textarea's top- and
bottom paddings dynamically.

Fixes #2018

ui/shared/status/StatusChatInput.qml

@@ -649,7 +649,7 @@ Rectangle {
 
     Rectangle {
         id: messageInput
-        property int maxInputFieldHeight: control.isStatusUpdateInput ? 123 : 112
+        property int maxInputFieldHeight: control.isStatusUpdateInput ? 124 : 112
         property int defaultInputFieldHeight: control.isStatusUpdateInput ? 56 : 40
         anchors.left: imageBtn.visible ? imageBtn.right : parent.left
         anchors.leftMargin: imageBtn.visible ? 5 : Style.current.smallPadding
@@ -658,7 +658,16 @@ Rectangle {
         anchors.bottomMargin: control.isStatusUpdateInput ? 0 : 12
         anchors.right: parent.right
         anchors.rightMargin: Style.current.smallPadding
-        height: scrollView.height
+        height: {
+            if (messageInputField.implicitHeight <= messageInput.defaultInputFieldHeight) {
+                return messageInput.defaultInputFieldHeight
+            }
+            if (messageInputField.implicitHeight >= messageInput.maxInputFieldHeight) {
+                return messageInput.maxInputFieldHeight
+            }
+            return messageInputField.implicitHeight
+        }
+
         color: Style.current.inputBackground
         radius: control.isStatusUpdateInput ? 36 :
           height > defaultInputFieldHeight + 1 || extendedArea.visible ? 16 : 32
@@ -689,7 +698,7 @@ Rectangle {
             height: {
               if (visible) {
                   if (isImage) {
-                      return imageArea.height + Style.current.halfPadding
+                      return imageArea.height
                   }
 
                   if (isReply) {
@@ -763,37 +772,27 @@ Rectangle {
 
         ScrollView {
             id: scrollView
+            anchors.top: parent.top
             anchors.bottom: parent.bottom
             anchors.left: profileImage.visible ? profileImage.right : parent.left
             anchors.leftMargin: Style.current.smallPadding
             anchors.right: actions.left
             anchors.rightMargin: Style.current.halfPadding
             ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
-            height: {
-                if (messageInputField.implicitHeight <= messageInput.defaultInputFieldHeight) {
-                    return messageInput.defaultInputFieldHeight
-                }
-                if (messageInputField.implicitHeight >= messageInput.maxInputFieldHeight) {
-                    return messageInput.maxInputFieldHeight
-                }
-                return messageInputField.implicitHeight
-            }
 
             TextArea {
                 id: messageInputField
                 textFormat: Text.RichText
-                verticalAlignment: TextEdit.AlignVCenter
                 font.pixelSize: 15
                 font.family: Style.current.fontRegular.name
                 wrapMode: TextArea.Wrap
-                height: parent.height
                 //% "Type a message"
                 placeholderText: qsTrId("type-a-message")
                 placeholderTextColor: Style.current.secondaryText
                 selectByMouse: true
                 color: Style.current.textColor
-                topPadding: Style.current.smallPadding
+                topPadding: control.isStatusUpdateInput ? 18 : Style.current.smallPadding
-                bottomPadding: 12
+                bottomPadding: control.isStatusUpdateInput ? 14 : 12
                 Keys.onPressed: onKeyPress(event)
                 Keys.onReleased: onRelease(event) // gives much more up to date cursorPosition
                 Keys.onShortcutOverride: event.accepted = isUploadFilePressed(event)