GUI: battlefield’s permanents auto-size logic must be reworked

Current size logic:
- take max card size from gui settings and try to auto-size it until it will be fully visible in the row
New size logic:
- take current row size and calculate card size for it

Current problems and possible fixes:
- [ ] different height for own and opponent battlefields - must be same (red marks on screenshot example);
- [ ] wrong card size calculation, so it can’t show two rows without scrolls (blue marks on screenshot);
- [ ] potential zoom control must use “rows amount to show” instead card size — no needs in per pixel zoom level;
- [ ] recommended settings from GUI size preferences must setup default zoom level (rows to show) instead min/max card size on battlefield.