Bug/2894 covers not updating (#2908)

* Use a wrapper around Manga to supply glide with proper equals() and hashCode() impl. for caching

* reload image if url has changed

* ignore case for http scheme comparison

* more ignore case for http scheme comparison

* fix indenting

* use data class for MangaThumbnail

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerPageHolder.kt

@@ -411,7 +411,7 @@ class PagerPageHolder(
         }
 
         val imageUrl = page.imageUrl
-        if (imageUrl.orEmpty().startsWith("http")) {
+        if (imageUrl.orEmpty().startsWith("http", true)) {
             PagerButton(context, viewer).apply {
                 layoutParams = LayoutParams(WRAP_CONTENT, WRAP_CONTENT).apply {
                     setMargins(margins, margins, margins, margins)

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonPageHolder.kt

@@ -454,7 +454,7 @@ class WebtoonPageHolder(
         }
 
         val imageUrl = page?.imageUrl
-        if (imageUrl.orEmpty().startsWith("http")) {
+        if (imageUrl.orEmpty().startsWith("http", true)) {
             AppCompatButton(context).apply {
                 layoutParams = FrameLayout.LayoutParams(WRAP_CONTENT, WRAP_CONTENT).apply {
                     setMargins(0, margins, 0, margins)