CORE-4718 Updated searchAppResultsHeader text.

Added a total count of search results to the display text.
Applied iPlant standard formatting to AppInfoView.

Shortened fully qualified references to org.iplantc.core.resources.client.messages.I18N.
CORE-4721 Added App search text highlighting.

Added highlightSearchText methods to AppsView and its Presenter.
Updated AppsViewPresenter to compile a RegExp from search text in AppSearchResultLoadEvents, used in its highlightSearchText method.
Updated AppHyperlinkCell to highlight search text in App names.
Updated AppColumnModel to highlight search text in Integrator names.
Updated AppInfoView to highlight search text in App descriptions, Integrator names, and tool names.