Changes: document debug-logging and FillGlobalStorageJob

CHANGES

@@ -9,10 +9,18 @@ This release contains contributions from (alphabetically by first name):
  - No external contributors yet
 
 ## Core ##
- - No core changes yet
+ - When logging level is set to 8 (eight), for instance via the `-D8`
+   logging flag, or the `-d` debug flag, the *Show debug information*
+   button will appear in the progress view. This helps with debugging
+   issues where the `-d` flag would be inappropriate.
+ - Calamares now starts at logging level 1 (warnings and errors to
+   the console) by default. Previously it (wrongly) started at level 8.
 
 ## Modules ##
- - No module changes yet
+ - The *partition* module now stores which filesystems are in use in
+   global storage. While this is currently incompatible with the
+   *contextualprocess* module, a custom module can make use of that
+   to optimise the target system for the filesystems that are present.
 
 
 # 3.2.19.1 (2020-02-24) #