Dash point by on default

[mlerjen]

(I had this problem before, #1728)

Steps to reproduce

1. Draw a line - dash point "purple dot" is on.
2. Draw a second line - switch off dash point by pressing space bar
3. Draw a third line - dash point still off. Normal points are set.
4. Draw another line object.
5. Draw a fourth line with the first object - dash point is on again.
   

Actual behaviour

So dash point is the default. It can be switched off as long as you stick with drawing features of the same symbol, but jumps back to default = dash point as soon you draw something else.

Expected behaviour

The dash point as the exception should be opt-in, but not default.

Configuration

Mapper Version: 0.9.5
Operating System: windows 7

[dl3sdo]

Yes, this is indeed the current behaviour.
For combined symbols there was some functionality missing which I added as PR #2154, i.e., for combined
symbols the current behaviour is as the one proposed by @mlerjen as default behaviour.

Changing the default behaviour for line symbols with dash symbols and combined symbols with dash symbols to opt-in is straightforward.
However, this could also be made configurable by using an additional 'lightweight' configuration mechanism (which I'm currently working on).