Parentheses are no longer placed around the children of a logarithm.
Fixes #119

Signed-off-by: Mark Kamsma <mark@markkamsma.nl>
The right tab in the source drawer is no shown after rotating the screen.
Fixes #120

Signed-off-by: Mark Kamsma <mark@markkamsma.nl>
A loading animation is now shown while evaluating the expression.
Fixes #111

Signed-off-by: Mark Kamsma <mark@markkamsma.nl>