[nebula-dev] 1.4.0 release update

[Wim Jongman <wim.jongman@xxxxxxxxx>]

Hi All,

I was not on time to schedule a release review so I have moved the release so that the review can be done on nov-1. After the review is successful we can release.

I have bumped all version numbers of changed widgets. See below.

Cheers,

Wim

### Nebula
* Nebula feature 1.3.0 -> 1.4.0
* category.xml

### Visualization
* Parent pom 1.0.0 -> 2.1.0
* XYGraph widget 3.0.0 -> 3.1.0
* Visualization Feature 2.0.0 -> 2.1.0
* category.xml

### CDateTime

* Parent pom 1.0.0 -> 1.1.0
* Widget 1.0.0 -> 1.1.0
* Feature 1.0.0 -> 1.1.0
* category.xml

### Grid * Parent pom 1.0.0 -> 1.1.0
* Widget 1.0.0 -> 1.1.0
* Feature 1.0.0 -> 1.1.0
* category.xml

### Oscilloscope
* Parent pom 1.2.0 -> 1.4.0
* Widget 1.2.0 -> 1.4.0
* Feature 1.3.0 -> 1.4.0
* category.xml

### TableCombo
* Parent pom 1.0.0 -> 1.1.0
* Widget 1.0.0 -> 1.1.0
* Feature 1.0.0 -> 1.1.0
* category.xml

### XViewer
* Parent pom 1.0.0 -> 1.1.0
* Widget 1.0.0 -> 1.1.0
* Feature 1.0.0 -> 1.1.0
* category.xml