Improve public key explanation

Signal/src/Loki/NewConversationViewController.swift

@@ -31,7 +31,7 @@ final class NewConversationViewController : OWSViewController {
         let explanationLabel = UILabel()
         explanationLabel.textColor = Theme.primaryColor
         explanationLabel.font = UIFont.ows_dynamicTypeSubheadlineClamped
-        explanationLabel.text = NSLocalizedString("For example: 059abcf223aa8c10e3dc2d623688b75dd25896794717e4a9c486772664fc95e41e.", comment: "")
+        explanationLabel.text = NSLocalizedString("Enter the public key of the person you'd like to securely message. They can share their public key with you by going into Loki Messenger's in-app settings and clicking \"Share Public Key\".", comment: "")
         explanationLabel.numberOfLines = 0
         explanationLabel.lineBreakMode = .byWordWrapping
         // Button

Signal/src/ViewControllers/HomeView/HomeViewController.m

@@ -396,9 +396,9 @@ typedef NS_ENUM(NSInteger, HomeViewControllerSection) {
      */
 
     UILabel *emptyInboxLabel = [UILabel new];
-    emptyInboxLabel.text = NSLocalizedString(@"Looks like you don\'t have any conversations yet. Get started by messaging a friend.", @"");
+    emptyInboxLabel.text = NSLocalizedString(@"Looks like you don't have any conversations yet. Get started by messaging a friend.", @"");
     emptyInboxLabel.font = UIFont.ows_dynamicTypeBodyClampedFont;
-    emptyInboxLabel.textColor = Theme.secondaryColor;
+    emptyInboxLabel.textColor = UIColor.whiteColor;
     emptyInboxLabel.textAlignment = NSTextAlignmentCenter;
     emptyInboxLabel.numberOfLines = 0;
     emptyInboxLabel.lineBreakMode = NSLineBreakByWordWrapping;

Signal/translations/en.lproj/Localizable.strings

@@ -2597,4 +2597,5 @@
 "For example: 059abcf223aa8c10e3dc2d623688b75dd25896794717e4a9c486772664fc95e41e." = "For example: 059abcf223aa8c10e3dc2d623688b75dd25896794717e4a9c486772664fc95e41e.";
 "Invalid Public Key" = "Invalid Public Key";
 "Please check the public key you entered and try again." = "Please check the public key you entered and try again.";
-"Looks like you don\'t have any conversations yet. Get started by messaging a friend." = "Looks like you don\'t have any conversations yet. Get started by messaging a friend.";
+"Looks like you don't have any conversations yet. Get started by messaging a friend." = "Looks like you don't have any conversations yet. Get started by messaging a friend.";
+"Enter the public key of the person you'd like to securely message. They can share their public key with you by going into Loki Messenger's in-app settings and clicking \"Share Public Key\"." = "Enter the public key of the person you'd like to securely message. They can share their public key with you by going into Loki Messenger's in-app settings and clicking \"Share Public Key\".";