Corrected a typo in Tessellator#addQuadraticVertex()

Fixes #2648 - corrected a typo in a5cbb0e2
Fixed error reporting for bez/quad/curve vertices

When user calls bezierVertex()/quadraticVertex()/curveVertex() and does
not call beginShape()/beginShape(POLYGON) before or forgets to specify
first vertex(), proper error message is shown.
fix firstline when modifying lines above it (fixes #2654)
Merge remote-tracking branch 'original/master'
error bar, old offset removed
ECS, 3 secs feels like a decent compromise
Create PDE_pt.properties

Initial translation. not yet finished.
Update PDE_pt.properties

Completada a tradução. Falta revisão.
Update PDE_pt.properties

Undo/Redo translated. Final verification needed
Update PDE_pt.properties
Update Language.java
Update PDE_pt.properties

Fixed typos.
Modes now can be removed without restart
Install works without restart for modes
Display dialog to prevent user from changing an active mode

And a few clean ups
Remove works for Tools without restart
Remove works across multiple open editors
Old remove methd used if remove without restart fails
No restart needed to Install Tools

And some work on restartless update and a few cleanups
Restart is no longer need for Updating contribs