Room Settings: Fix rendering of the room topic.

Vector/Views/TableViewCell/TableViewCellWithLabelAndLargeTextView.m

@@ -18,18 +18,55 @@
 
 @implementation TableViewCellWithLabelAndLargeTextView
 
-- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
+- (void)awakeFromNib
 {
-    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
-    if (self)
-    {
-    }
+    [super awakeFromNib];
     
-    return self;
+    // Adjust text view
+    // Remove the container inset: this operation impacts only the vertical margin.
+    // Reset textContainer.lineFragmentPadding to remove horizontal margin.
+    _textView.textContainerInset = UIEdgeInsetsZero;
+    _textView.textContainer.lineFragmentPadding = 0;
 }
 
-- (void)dealloc
+- (void)layoutSubviews
 {
+    [super layoutSubviews];
+    
+    CGFloat cellWidth = self.contentView.frame.size.width;
+    
+    CGRect frame = _label.frame;
+    CGFloat minTextViewPosX = frame.origin.x + frame.size.width + _labelTrailingMinConstraint.constant;
+    
+    CGFloat maxTextViewWidth = cellWidth - minTextViewPosX - _textViewTrailingConstraint.constant;
+    
+    if (_textView.isFirstResponder)
+    {
+        // Use the full available width when the field is edited
+        _textViewWidthConstraint.constant = maxTextViewWidth;
+    }
+    else
+    {
+        // Adjust the text view width to display it on the right side of the cell
+        CGSize size = _textView.frame.size;
+        size.width = maxTextViewWidth;
+        
+        size = [_textView sizeThatFits:size];
+        
+        _textViewWidthConstraint.constant = size.width;
+    }
+}
+
+#pragma mark -
+
+- (void)textViewDidBeginEditing:(UITextView *)textView;
+{
+    [self setNeedsLayout];
+}
+
+- (void)textViewDidEndEditing:(UITextView *)textView
+{
+    [self setNeedsLayout];
 }
 
 @end