Refactor to allow switching between views

[jsbrn]

#4

The panel showing the directories was moved to the "next" view tentatively, in order to demonstrate the functionality.

[mlem]

Hey @jsbrn
I've looked at your PR and I can't build it with gradle.
There seems to be a missing dependency?

$ ./gradlew build

> Task :compileJava
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\ChooseDirectoriesView.java:112: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer1 = new com.intellij.uiDesigner.core.Spacer();
                                          ^
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\ChooseDirectoriesView.java:112: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer1 = new com.intellij.uiDesigner.core.Spacer();
                                                                                            ^
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\ChooseDirectoriesView.java:125: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer2 = new com.intellij.uiDesigner.core.Spacer();
                                          ^
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\ChooseDirectoriesView.java:125: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer2 = new com.intellij.uiDesigner.core.Spacer();
                                                                                            ^
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\StartView.java:69: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer1 = new com.intellij.uiDesigner.core.Spacer();
                                          ^
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\StartView.java:69: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer1 = new com.intellij.uiDesigner.core.Spacer();
                                                                                            ^
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\StartView.java:71: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer2 = new com.intellij.uiDesigner.core.Spacer();
                                          ^
C:\Users\beoxtc\IdeaProjects\installer\src\main\java\io\pzstorm\installer\gui\StartView.java:71: error: package com.intellij.uiDesigner.core does not exist
        final com.intellij.uiDesigner.core.Spacer spacer2 = new com.intellij.uiDesigner.core.Spacer();
                                                                                            ^
8 errors

> Task :compileJava FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 5s
1 actionable task: 1 executed

[jsbrn]

@mlem It depends on IntelliJ IDEA's UI designer tool. 14 months later I recognize that isn't very useful to people who don't use that IDE.