Special Character dialog window shows the same tooltip for symbols with different spelling case

[Satya Minnekanti]

To reproduce the defect:

1. Open any CK Editor sample and open Special Character dialog.

2. Hover your mouse over the two icons next to bullet in last row

Issue: They both have same label Rightwards double arrow.

The same goes for some pairs of letters, capital & small, like Œ and œ, for example.

[Anna Tomanek]

The correct definitions, as per Unicode names, should be "Rightwards arrow" (for →) and "Rightwards double arrow" (for ⇒).

The error, however, stems from the fact that the editor does not differentiate between spellings with different case.

For arrows there should be two separate definitions for that in the specialchar/lang/en.js file and the editor should take letter case (rarr vs rArr) into account. This is a general problem, however, and more definitions are affected, like Œ and œ (Latin capital ligature oe and Latin small ligature oe) etc., so I am updating the ticket title.

We also seem to be missing the definitions for capital letters, or, in other words, all symbols with entities containing a capital letter (Ugrave, OElig) are missing from the lang/en.js file.

[Anna Tomanek]

Proposed patch