Bug 25630: Fix capitalization and terminology for Accounting, Administration and...

Bug 25630: Fix capitalization and terminology for Accounting, Administration and Serials system preferences

- Punctuation (p)
- Terminology
- Capitalization (c)

To test:
- Verify:
  - AccountAutoReconcile (Do not to Don't for consistency with other prefs)
  - IndependentBranchesPatronModifications (p)
  - IndependentBranchesTransfers (p)
  - GoogleOpenIDConnect (google to Google)
  - UsageStatsLibrariesInfo (c)
  - opacSerialDefaultTab (c)
  - StaffSerialIssueDisplayCount (staff interface)
  - SubscriptionDuplicateDroppedInput (c)

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>