V106 QUICK FINITE-FAULT GRID SIZE CONTROLS

Base
- Built from V105 quick finite-fault Excel-style grid editor.

What changed
- Added Rows and Cols input boxes to the quick finite-fault editor.
- Added a Resize grid button.
- Grid size can be adjusted from 3..9 rows and 3..9 columns.
- The C3 cell remains the epicenter/reference cell, so the minimum is 3x3.
- Existing cell values are preserved when resizing within the overlapping row/column range.
- New cells are initialized blank with the current default dip.

Usage
- Press S to open the quick finite-fault editor.
- Set Rows / Cols.
- Press Resize grid.
- Fill each cell as slip,delay,dip.
