New build of Client Terminal: MetaTrader4 build 148

MetaTrader4 build 148

What’s new:
1. Updated S/L level modification property.
2. Updated MQL4 compiler by unused functions property.
3. Updated import from MetaTrader 3.xx.
4. Added «Text label» on graphics objects toolbar.
5. Changed background colors of approach indication to S/L level.
6. Updated ZigZag custom indicator.
7. Added Undo property for graphics objects (but it is not enabled).
8. Updated MetaEditor built-in MQL4 description.