Bug fixes: Textblock layout | Parsing warnings (#7041)

* need to take accoutn for empty

* works but need to find memory leak

* testing against stackedit

* removing unneeded line | allocating array

* clean up

* getting rid of str() use from strigstream

* handling link destination with [ character and other tokens

* removing cpp changes

Co-authored-by: Janus Balatbat <jsbalatbat@microsoft.com>

Author: janusbal

source/ios/AdaptiveCards/AdaptiveCards/AdaptiveCards/ACOAdaptiveCard.mm

@@ -63,7 +63,7 @@ + (ACOAdaptiveCardParseResult *)fromJson:(NSString *)payload;
         try {
             ACOAdaptiveCard *card = [[ACOAdaptiveCard alloc] init];
             std::shared_ptr<ParseResult> parseResult = AdaptiveCard::DeserializeFromString(std::string([payload UTF8String]), std::string("1.5"));
-            NSMutableArray *acrParseWarnings;
+            NSMutableArray *acrParseWarnings = [[NSMutableArray alloc] init];
             std::vector<std::shared_ptr<AdaptiveCardParseWarning>> parseWarnings = parseResult->GetWarnings();
             for (const auto &warning : parseWarnings) {
                 ACRParseWarning *acrParseWarning = [[ACRParseWarning alloc] initWithParseWarning:warning];

source/ios/AdaptiveCards/AdaptiveCards/AdaptiveCards/ACRColumnView.mm

@@ -52,7 +52,7 @@ - (void)configureWidthOfView:(UIView *)view
         }
 
         [view setContentHuggingPriority:priority forAxis:UILayoutConstraintAxisHorizontal];
-        [view setContentCompressionResistancePriority:UILayoutPriorityDefaultHigh forAxis:UILayoutConstraintAxisHorizontal];
+        [view setContentCompressionResistancePriority:UILayoutPriorityDefaultLow forAxis:UILayoutConstraintAxisHorizontal];
         [self setContentHuggingPriority:priority forAxis:UILayoutConstraintAxisHorizontal];
         [self setContentCompressionResistancePriority:UILayoutPriorityDefaultHigh forAxis:UILayoutConstraintAxisHorizontal];
         // if columnWidth is set to stretch or number, allow column to fill the available space