This commit clarifies the account transactions report: as before the included transactions
are the original unfiltered transactions, but now the change and running balance amounts
are calculated from the report-matched postings. This fixed the limitation noted in 509f558,
so that toggling real mode in any screen could work. Then I decided the transaction screen
shouldn't show a partial transaction after all, so real/cleared filtering is no longer allowed or indicated here.
There is a limitation/bug: disabling real mode in the transaction screen
won't show the non-real postings if it was entered from a real-mode
register screen.
You can now toggle showing only cleared items in the accounts and
register screens, with C (like the command-line flag).
The f key has been changed to F for consistency (we don't have this as a
command-line flag, though we could, though Ledger uses it for something
different).
Screen titles have been tweaked, eg switching the cyan and yellow.
Screen help has been squeezed to fit better in 80 columns.
