Optimize tablet layout

java/res/xml-sw600dp/kbd_10_10_7_symbols.xml

java/res/xml-sw600dp/kbd_10_10_7_symbols_shift.xml

java/res/xml-sw600dp/key_space_symbols.xml

java/res/xml-sw600dp/key_styles_common.xml

java/res/xml-sw600dp/row_symbols4.xml

java/res/xml-sw600dp/row_symbols_shift4.xml

java/res/xml-sw600dp/rowkeys_symbols2.xml

java/res/xml-sw600dp/rowkeys_symbols3.xml

java/res/xml-sw600dp/rowkeys_symbols_shift1.xml

java/res/xml-sw600dp/rowkeys_symbols_shift2.xml

java/res/xml-sw600dp/rowkeys_symbols_shift3.xml

java/res/xml-sw600dp/rows_10_10_7_symbols.xml

java/res/xml-sw600dp/rows_10_10_7_symbols_shift.xml

java/res/xml-sw600dp/rows_symbols.xml

java/res/xml-sw600dp/rows_symbols_shift.xml

java/res/xml/key_space_symbols.xml

java/res/xml/keyboard_layout_set_azerty.xml

java/res/xml/keyboard_layout_set_colemak.xml

java/res/xml/keyboard_layout_set_dvorak.xml

java/res/xml/keyboard_layout_set_hebrew.xml