More test shuffling

- Move more tests around
- Rename some test files
- Disable one test (markdown-355)
  Not sure why it's now failing. We should come back to this.
- Add more placeholder test scenarios (marked with @todo)
  You can run just these tests with `behave --no-skipped --tags=todo`
- Fix "missing_directory" test
  This test was missing the config file it was trying to use. So, it was
  really a very useless, broken test that we absolutely should not have
  approved the PR (#963) for.

features/data/configs/missing_directory.yaml

@@ -0,0 +1,17 @@
+default_hour: 9
+default_minute: 0
+editor: ""
+encrypt: false
+highlight: true
+journals:
+  default: features/journals/missing_directory/simple.journal
+linewrap: 80
+tagsymbols: "@"
+template: false
+timeformat: "%Y-%m-%d %H:%M"
+indent_character: "|"
+colors:
+  date: none
+  title: none
+  body: none
+  tags: none

features/data/configs/missing_journal.yaml

@@ -0,0 +1,17 @@
+default_hour: 9
+default_minute: 0
+editor: ""
+encrypt: false
+highlight: true
+journals:
+  default: features/journals/missing.journal
+linewrap: 80
+tagsymbols: "@"
+template: false
+timeformat: "%Y-%m-%d %H:%M"
+indent_character: "|"
+colors:
+  date: none
+  title: none
+  body: none
+  tags: none