[SES-2733] Preventing files from being selected in media overview

app/src/main/java/org/thoughtcrime/securesms/media/MediaOverviewViewModel.kt

@@ -171,6 +171,11 @@ class MediaOverviewViewModel(
 
     fun onItemClicked(item: MediaOverviewItem) {
         if (inSelectionMode.value) {
+            if (item.slide.hasDocument()) {
+                // We don't support selecting documents in selection mode
+                return
+            }
+
             val newSet = mutableSelectedItemIDs.value.toMutableSet()
             if (item.id in newSet) {
                 newSet.remove(item.id)
@@ -213,11 +218,6 @@ class MediaOverviewViewModel(
     }
 
     fun onTabItemClicked(tab: MediaOverviewTab) {
-        if (inSelectionMode.value) {
-            // Not allowing to switch tabs while in selection mode
-            return
-        }
-
         mutableSelectedTab.value = tab
     }