Review Text format decisions

We made a few decisions that deviated from Excel in cases where we think they have a bug. This issue to review these with a broader group.

>> Text(70.82430555555555555555555,"h:mm:ss A/P")
"7:47:00 P"

>> Text(70.82430555555555555555555,"h:mm:ss a/p")
"7:47:00 p"

>> Text(70.82430555555555555555555,"h:mm:ss AM/PM")
"7:47:00 PM"

>> Text(70.82430555555555555555555,"h:mm:ss am/pm")
"7:47:00 pm"

// C# supports E without a '+' or '-' after it.  Consitent with Excel, we do not.
>> Text(1234567.123,"0.00E+")
Error

>> Text(1234567.123,"0.00E")
Error

>> Text(1234567.123,"0.00e+")
Error

>> Text(1234567.123,"0.00e")
Error

>> Text( 1234567.1234567, "e" )
Errors: Error 0-28: The function 'Text' has some invalid arguments.|Warning 23-26: Incorrect format specifier for 'Text'.

// Excel: "0123.46E+04"
>> Text( 1234567.1234567, "0000.00E+00" )
"1234.57E+03"

// Excel: "123.46E+04"
>> Text( 1234567.1234567, "####.00E+00" )
"1234.57E+03"

// Oddball case from Excel, returns "Z5280ro", which appears to be undocumented behavior.  
// We don't interpret the 'e'.  
>> Text( 1234567.1234567, "Zero" )
"Zero"

// Colon, interpreted as a time seperator, not allowed between numbers, REVIEW
// Excel: ":"
>> Text( 2, ":" )
":"

// Excel: ":"
>> Text( 2, "::" )
"::"

// Excel: ":"
>> Text( 2, ":::" )
":::"

// Text of Blank, without a format, is blank.  Text of Blank, with a format, is empty string.
>> Text( If(1<0,1,Blank()) )
Blank()

>> Text( If(1<0,1,Blank()), "####" )
""