debug mode added for memory testing

src/activities/reader/EpubReaderActivity.cpp

@@ -192,6 +192,7 @@ void EpubReaderActivity::onExit() {
   if (displayTaskHandle) {
     vTaskDelete(displayTaskHandle);
     displayTaskHandle = nullptr;
+    vTaskDelay(10 / portTICK_PERIOD_MS);  // Let idle task free stack
   }
   vSemaphoreDelete(renderingMutex);
   renderingMutex = nullptr;

src/activities/reader/EpubReaderChapterSelectionActivity.cpp

@@ -88,6 +88,7 @@ void EpubReaderChapterSelectionActivity::onExit() {
   if (displayTaskHandle) {
     vTaskDelete(displayTaskHandle);
     displayTaskHandle = nullptr;
+    vTaskDelay(10 / portTICK_PERIOD_MS);  // Let idle task free stack
   }
   vSemaphoreDelete(renderingMutex);
   renderingMutex = nullptr;

src/activities/reader/TxtReaderActivity.cpp

@@ -131,6 +131,7 @@ void TxtReaderActivity::onExit() {
   if (displayTaskHandle) {
     vTaskDelete(displayTaskHandle);
     displayTaskHandle = nullptr;
+    vTaskDelay(10 / portTICK_PERIOD_MS);  // Let idle task free stack
   }
   vSemaphoreDelete(renderingMutex);
   renderingMutex = nullptr;

src/activities/reader/XtcReaderActivity.cpp

@@ -109,6 +109,7 @@ void XtcReaderActivity::onExit() {
   if (displayTaskHandle) {
     vTaskDelete(displayTaskHandle);
     displayTaskHandle = nullptr;
+    vTaskDelay(10 / portTICK_PERIOD_MS);  // Let idle task free stack
   }
   vSemaphoreDelete(renderingMutex);
   renderingMutex = nullptr;

src/activities/reader/XtcReaderChapterSelectionActivity.cpp

@@ -69,6 +69,7 @@ void XtcReaderChapterSelectionActivity::onExit() {
   if (displayTaskHandle) {
     vTaskDelete(displayTaskHandle);
     displayTaskHandle = nullptr;
+    vTaskDelay(10 / portTICK_PERIOD_MS);  // Let idle task free stack
   }
   vSemaphoreDelete(renderingMutex);
   renderingMutex = nullptr;