Make the coverage categories different

gcovr.cfg

@@ -6,9 +6,11 @@ exclude = src/main.cpp
 # exclude = src/model/*
 # exclude = src/spatial/*
 # exclude = src/style/*
+# fail-under-line = 85
+# fail-under-branch = 85
 html-details = yes
+html-medium-threshold = 70
+html-high-threshold = 85
 output = build/documentation/coverage/index.html
 delete-gcov-files = yes
-# fail-under-line = 80
-# fail-under-branch = 80
 print-summary = yes