DeskCalc: Update copyright headers

Style fixes to header, update copyright years, remove my name
from files that I didn't have anything to do with besides style fixes,
add myself to ExpressionTextView.cpp
DeskCalc: Style fixes
DeskCalc: Remove pre-ControlLook drawing code
DeskCalc: Remove ResizeTo()
DeskCalc: Add private _IsEmbedded() method
DeskCalc: Replace comment with equivalent code
DeskCalc: Preserve selection on resize
DeskCalc: Resize a bit more efficiently.

Remove B_FULL_UPDATE_ON_RESIZE flag from view.

We already Invalidate() on FrameResized() which redraws the
view on resize for us. This reduces the number of times Draw() is called
from 3+ in some cases to just one. Unfortunately Draw() is still called
multiple times in some cases producing noticable flickering and drawing
artifacts but it is marginally better.
ExpressionParser: Simplify pi detection