date break font/color to spec

// FREEBIE

Signal/src/ViewControllers/ConversationView/Cells/OWSMessageCell.m

@@ -258,7 +258,7 @@ NS_ASSUME_NONNULL_BEGIN
         NSString *dateString = [DateUtil formatDateForConversationDateBreaks:date];
 
         self.dateHeaderLabel.font = self.dateHeaderFont;
-        self.dateHeaderLabel.textColor = UIColor.lightGrayColor;
+        self.dateHeaderLabel.textColor = self.conversationStyle.dateBreakTextColor;
 
         self.dateHeaderLabel.text = dateString;
 
@@ -289,7 +289,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (UIFont *)dateHeaderFont
 {
-    return UIFont.ows_dynamicTypeCaption1Font;
+    return UIFont.ows_dynamicTypeCalloutFont;
 }
 
 #pragma mark - Avatar

SignalMessaging/categories/UIFont+OWS.h

@@ -30,8 +30,9 @@ NS_ASSUME_NONNULL_BEGIN
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeTitle2Font;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeTitle3Font;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeHeadlineFont;
-@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeSubheadlineFont;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeBodyFont;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeCalloutFont;
+@property (class, readonly, nonatomic) UIFont *ows_dynamicTypeSubheadlineFont;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeFootnoteFont;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeCaption1Font;
 @property (class, readonly, nonatomic) UIFont *ows_dynamicTypeCaption2Font;

SignalMessaging/categories/UIFont+OWS.m

@@ -72,14 +72,19 @@ NS_ASSUME_NONNULL_BEGIN
     return [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
 }
 
-+ (UIFont *)ows_dynamicTypeSubheadlineFont
++ (UIFont *)ows_dynamicTypeBodyFont
 {
-    return [UIFont preferredFontForTextStyle:UIFontTextStyleSubheadline];
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
 }
 
-+ (UIFont *)ows_dynamicTypeBodyFont
++ (UIFont *)ows_dynamicTypeCalloutFont
 {
-    return [UIFont preferredFontForTextStyle:UIFontTextStyleBody];
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleCallout];
+}
+
++ (UIFont *)ows_dynamicTypeSubheadlineFont
+{
+    return [UIFont preferredFontForTextStyle:UIFontTextStyleSubheadline];
 }
 
 + (UIFont *)ows_dynamicTypeFootnoteFont

SignalMessaging/utils/ConversationStyle.swift

@@ -145,6 +145,9 @@ public class ConversationStyle: NSObject {
     @objc
     public let bubbleColorOutgoingSent = UIColor.ows_darkSkyBlue
 
+    @objc
+    public let dateBreakTextColor = UIColor.ows_light60
+
     @objc
     public var primaryColor: UIColor