TASInputDlg: Remove unnecessary wxWidgets default values.
TASInputDlg: Replace some for loops with range-based for loops.
TASInputDlg: Fix a typo in layout alignment flags
TASInputDlg: Eliminate the usage of some spacers.

Bordering parameters can be specified on addition.
Merge pull request #1662 from lioncash/tas

TASInputDlg: General cleanup.