User interface/experience enhanced
- Reinforcement ratio is now converted to mm2/m in a pop-up when hoovering
- Negative material inputs are now catched on edit.
- Does not check the input value validity during editing, it waits until editing finished
- Better error description for invalid geometry
- Shows file name in window title after load and save
- Renamed label "alpha_c" to "alpha_cc"
- Analysis bottom redesigned for better UX