Application:
v Implement "Save" menu

Functionality:
- Context menu in symbol navigator
- Delete symbols before/after selected
- Shift all symbols on code line (change symbol codes)
- Specify starting code (extends the shift)
V "Only numbers" range in the New dialog
V "Specify range" in the New dialog
V "Single frame", "only numbers" and "specify range" as radio buttons
- Ability to make monospaced font variable width one
- Button to Clear/Fill a block
- Undo/Redo
- Image import from a file
- Import from a text array
V Copy-paste to a symbol with different size
- Rectangle selection to mass-paint, shift and mirror pixels
- Change height of variable width fonts with ability to choose which side to add pixels to
V Make it possible to have zero width chars in VarWidth fonts
- "Packed" fonts export
- Tooltips on main form

Bugs:
V Every char changes its width to default on VarWidth font height change!
V App allows to create fonts with a gap in symbol cequence!
V File -> New does not check for unsaveed changes!