#1180 Split transaction Status for Transfers

[stef145g]

This sets the status of a transfer as a 2 character token instead of one.
The database status is recorded as NN for both sides being unreconciled but is viewed as normal in Account View.
When the A side is reconciled and B side as Follow-up the database shows RF.
Viewing the transactions, the A side will show the status as R and viewing the B side will show as F

On changeover, both sides of a transaction will assume the current status for both sides until it is modified by the update. Reverting back and remodifying the transaction will restore to original.

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This change is 

[slodki]

We shouldn't change dictionary changes to the database without db version change and existing entries update.
This breaks android app without warning.

[gabriele-v]

Agree with @slodki
We should also provide a patch to set all previous transfers to RR, otherwise we will have some transfers with two characters and some with just one

[gabriele-v]

I haven't seen this PR and noticed new behaviour before #1773 but it's a really big change that should be highlighted because it could also break custom reports looking at STATUS = "R"