Adapt TypeSelector to changes from NewItemDialog

[pfleck]

The behavior of the TypeSelecor should be the same like the NewItemDialog.

• The matching of search-tokens.
• Clear-Button in the search-TextBox.

[pfleck]

r12397

• Adapted behavior of the matching in the TypeSelector that it behave the same as the NewItemDialog. The search string is tokenized by space and matches if all tokens are contained, (eg. "Sym Reg" matches "SymbolicRegression...").
• Enabled navigation with up- and down-arrow in the tree while the search-box is focused.
• Improved response time of NewItemDialog and TypeSelector when they contain a large amount of nodes.

[pfleck]

r12398

• Added clearSearch-button in TypeSelector.
• Adapted behavior of TypeSelector and NewItemDialog that a selected node stays selected as long as it matches the search criteria.

[pfleck]

r12399

• Added context-menu for expanding and collapsing tree-nodes.
• Improved response time when expanding/collapsing all nodes for TypeSelector and NewItemDialog.

[pfleck]

r12400 Forgot to commit a file.

[pfleck]

r12401 Fixed a bug where the automatic selection of the first element behaved differently for the NewItemDialog.

[mkommend]

Reviewed all changesets in this ticket. This ticket must be released together with #2025.

[mkommend]

r12708: Merged all changes regarding the type selector into stable.